浏览器自定义横向滚动条
Custom scrollbars – cross-browser solutionToday we will create custom stylized scrollbars for our website(s). We will use pure javascript to build own scrollbar. So this will really cross browser solution. We can use keys Up/Down keyboard keys to scroll content, mouse roller, drag and drop of scroller, etc (all what should have normal scrollbar).
自定义滚动条–跨浏览器解决方案今天，我们将为我们的网站创建自定义样式化的滚动条。 我们将使用纯JavaScript来构建自己的滚动条。 因此，这将真正跨浏览器解决方案。 我们可以使用上/下键盘键来滚动内容，鼠标滚轮，滚动条的拖放等(所有这些都应具有正常的滚动条)。
In beginning – download our package and check demo:
首先，请下载我们的软件包并查看演示：
现场演示
[sociallocker]
[社交储物柜]
打包下载
[/sociallocker]
[/ sociallocker]
Lets start coding !
让我们开始编码！
步骤1. HTML (Step 1. HTML)
As usual, we start with the HTML. This is source code of our sample:
和往常一样，我们从HTML开始。 这是我们示例的源代码：
index.html (index.html)
<html><head><link rel="stylesheet" href="css/main.css" type="text/css" /><script src="js/main.js"></script></head><body><div class="example"><div id="main_content" style="height:90%;"><div class="parent"><h2>Arkady and Boris Strugatsky. Poor cruel folk</h2><img src="images/engl_amal02.gif" alt="" /><div>The King sat naked. Like a foolish pauper on the street, he sat leaningagainst a cold wall, drawing in his blue, goose-bumped legs. He shivered,with his eyes closed, he listened, but everything was quiet.</div><div>He awoke at midnight from a nightmare and immediatelly understood thathe was finished. Some one weezed and writhed by the door of the bedroomsuite, he heard footsteps, metalic jingling and drunken mummbling of HisHighness, Uncle Buht: "Let me through... Let me.. Break it down, hell withit..." Wet with icy sweat, he slintly rolled off his bed, ducked into asecter closet, and loosing himself he ran down the underground passage.Something sqelched under his bare feet, the startled rats dashed away, buthe did not notice anything, just now, sitting next to a wall he rememberedeverything; the darkness, the slippery walls, and the pain from a blow onthe head against the shakled door to the temple, and his own unberable highyelp.</div><div>They shall not enter here, he thought. No one shall enter here. Only ifthe King order's so. But the King shall not order... He snickeredhysterically. Oh no, the King will not order! He carefully un screwed up hiseyes and saw his blue, hairless legs with scraped knees. Still alive, hethought. I will live, because they shall not enter here.</div><div>Everything in the temple was blueish from the cold light of thelanterns -- long glowing tubes that were stretched under the ceiling. In thecenter, God stood on an eminence, big, heavy, with sparkling dead eyes. TheKing continuously and stupidly stared, until God was suddenly screened by ashabby lay brother, still a greenhorn. Scraching, with an open mouth hegazed at the naked King. The King squinted once again. Scum, he thought, alousy vermine, catch the mongrel and to the dogs, for them to ravage... Hereasoned that he did not remember the lout well, but he was long gone. Soscrawny, snotty... That's all right, we'll remember. We'll remebereverything, Your Highness, Uncle Buht. During the father's reighn, I daresay you sat quietly, drank a bit and kept silent, were afraid to be noticed,you knew that King Prostyaga did not forget you ignoble treachery...</div><div>Great was the father, the King thought with an accustomed envy. You'dbe great, if your advisors are God's angels in flesh. All know, all haveseen them: their faces fearful, white, like milk, and their garment weresuch that one could not understand if they were naked or not. And theirarrows were fiery, like lightning, they drove off the nomads with thearrows, and although they casted them overhead, half the horde cripled fromfear. His Highness, Uncle Buht, wispered once upon a time, drunk andburping, that those arrows can be cast by anyone, that special slings areneeded that the angels have and that would be nice to take from them. And hesaid then -- he was drunk then, -- that if it is nice to have, why not haveit, why not... Soon after that table talk one angel fell off the wall intothe moat, probably slipped. Next to him they found one of uncle's bodyguards with a javelin between his shoulder blades. It was a dark, darkdeed... It good that the people did not care about the angels, they werescary to look at, but it is not clear why is it scary -- angels were happy,cordial people. Only their eyes were scary. Small, shiny, and they keepracing around... non humanoid eyes, not peaceful. So the people hushed down,although father, King Prostyaga gave them such freedom that it is shamefulto remember... although, before the Coup, father, they say was a saddlemaker. For saying so, with my own hands I had torn eyes out, and sewen earsshut. But I remember, he used to sit in the evenings by the Crystal Tower,and he would cut out leather -- beautiful work. And I would perch myself athis side, it's warm and comfy... The angels were singing from the rooms, soquietly, and in harmony, and father would start to accompany -- he knewtheir language -- it used to be spacious, nobody around... not like now,guards are stuck at every corner, but there is no sense in it...</div><div>The King lamented. Yes, he was a good father, just that he did not diefor a long time. You can't do that while your son is still alive... The sonis also the King, the son also want's to... But Prostyaga did not age, I'mover fifty,and he still looks younger than me... It looks like the angelshad asked God for his health... They asked for his health, but they forgotabout me. They say that the second one they managed to pin down in thefather's room, he had a sling in each hand, but he did not fight. Beforedeath, they say, he threw both of them out the window, they burst into ablue flame, there was no dust left... Too bad about the slings... AndProstyaga, they say, cried and got drunk then, within an inch of his life --the first time since his reign -- looked for me, they said, loved me,believed...</div><div>The King drew his knees to his chin, and hugged his leggs. So what ifhe believed? One should know one's limit, abdicate, like it is doneelsewhere... and I do not know anything, and do not want to. There was onlya conversation with my uncle, His Highnesss.</div><div>"Prostyaga, -- he said, -- doesn't age". -- "Yes, -- I tell him, -- butwhat can we do, the angels pleaded for his health." Uncle then sneered,scum, and wispered: "Angels, -- he said, -- no longer sing their songshere". And I blurted out: "It is true, but now there is a way to deal withthem, not just with humans". Uncle looked at me soberly, and immediatellyleft... And I didn't really say anything... Empty words, without meaning...And in a week Prostyaga died from a heart attack. So what? It was his time.He looked young, but in reality he was over one hundred. We'll all die...</div><div>The King was startled, and covering himself, awkwardly sat up. Into thetemple came the High Priest Agar. Lay brothers were leading him by thehands. He didn't look at the King, came up to God and kneeled in front ofthe eminence, tall, hunch-backed, with waist length dirty-white hair. TheKing gloated "It's the end of you, Your Highness, you did manage, I'm notlike Prostyaga, you'll ravage your oun intestines, drunken swine..." Agarspoke in a rich voice:</div><div>- God! The King wishes to speak to you! Forgive him and listen!</div><div>The room fell silent, no-one dared to breathe. The King contemplated:when the great flood happened, and the earth burst, Prostyaga asked God tohelp, and God came down from the sky as a ball of flame on the same day, andthat night the earth closed up, and the flood disappeared. It means thatthis is how it will happen today. You were late uncle, Your Highness, youdidn't manage. No one can help you now...</div><div>Agar straighned up. The lay brothers that supported him, jumped away,turned with their backs to God, and covered their heads with their arms. TheKind saw, how Agar stretced his clasped hands and put them on Gods chest.God's eyes lit up. The King snapped his jaw from fear: the eyes were big anddifferent -- one was snakish-green, the other white, as bright as light. Onecould hear how God started to breathe, heavily, with crackling, likeconsumption. Agar backed away.</div><div>- Speak, - he whispered. It looked like he was unsettled as well.</div><div>The King lowered to all fours, and started to crawl to the eminence. Hedid not know what to do or how. And he did not know how he should start andwhether he should tell the complete truth. God breathed heavily, weezing,suddenly he started to whimper, quietly and thinly - scary.</div><div>- I'm the son of Prostyaga -- said the King in despair, smothering hisface against the cold stone. -- Prostyaga died. I ask protection from theconspirators. Prostyaga made mistakes. He did not know what he was doing. Ihave fixed everything: calmed the people, became great and unatainable, likeyou, I gathered an army... And the treacherous Buht is disrupting my plansto conquer the world... He wants to kill me! Help me!</div><div>He raised his head. God, without blinking, was looking in his face withgreen and white. God was silent.</div><div>- Help me... - repeated the King. -- Help! Help! - He suddenly thought,that he is doing something wrong, and that God is indifferent towards him,and inopportunely remembered: they said, his father, Prostyaga, did not diefrom a heart attack, but was killed here, in the temple when the killerscame in, with out asking permission. -- Help!.-- he screemed desperatelly.-- I'm afraid to die today! Help! Help!</div><div>He hunched up on the stone tiles, biting his hands from an unbarableterror. Differently-eyed God hoarsly breathed above his head.</div><div>- Old vermine, - said Tolya. Ernst was quiet. On the screen, throughthe sparks of static an ugly black shape of a human lay splattered on thefloor. -- When I think, Tolya spoke again, -- that if not for him, Alan andDerek would be alive, I want to do something, that you never wanted to do.</div><div>Ernst shrugged his shoulders and moved to the table.</div><div>- And I always think, - Tolya continued, - why didn't Derek shoot? Hecould have killed all...</div><div>- He couldn't , - said Ernst.</div><div>- Why couldn't he?</div><div>- Have you ever tried shooting at a human being?</div><div>Tolya made a wry face, but didn't say anything.</div><div>- Well that's what it was, - said Ernst. -- Try to imagine it. It isalmost as disgusting.</div><div>A sorowful howl was heard from the loudspeaker. "HELP HELP I AM AFRAIDHELP..," the auto-translater was writing.</div><div>- Poor cruel folk... - said Tolya.</div></div></div></div></body></html>
<html><head><link rel="stylesheet" href="css/main.css" type="text/css" /><script src="js/main.js"></script></head><body><div class="example"><div id="main_content" style="height:90%;"><div class="parent"><h2>Arkady and Boris Strugatsky. Poor cruel folk</h2><img src="images/engl_amal02.gif" alt="" /><div>The King sat naked. Like a foolish pauper on the street, he sat leaningagainst a cold wall, drawing in his blue, goose-bumped legs. He shivered,with his eyes closed, he listened, but everything was quiet.</div><div>He awoke at midnight from a nightmare and immediatelly understood thathe was finished. Some one weezed and writhed by the door of the bedroomsuite, he heard footsteps, metalic jingling and drunken mummbling of HisHighness, Uncle Buht: "Let me through... Let me.. Break it down, hell withit..." Wet with icy sweat, he slintly rolled off his bed, ducked into asecter closet, and loosing himself he ran down the underground passage.Something sqelched under his bare feet, the startled rats dashed away, buthe did not notice anything, just now, sitting next to a wall he rememberedeverything; the darkness, the slippery walls, and the pain from a blow onthe head against the shakled door to the temple, and his own unberable highyelp.</div><div>They shall not enter here, he thought. No one shall enter here. Only ifthe King order's so. But the King shall not order... He snickeredhysterically. Oh no, the King will not order! He carefully un screwed up hiseyes and saw his blue, hairless legs with scraped knees. Still alive, hethought. I will live, because they shall not enter here.</div><div>Everything in the temple was blueish from the cold light of thelanterns -- long glowing tubes that were stretched under the ceiling. In thecenter, God stood on an eminence, big, heavy, with sparkling dead eyes. TheKing continuously and stupidly stared, until God was suddenly screened by ashabby lay brother, still a greenhorn. Scraching, with an open mouth hegazed at the naked King. The King squinted once again. Scum, he thought, alousy vermine, catch the mongrel and to the dogs, for them to ravage... Hereasoned that he did not remember the lout well, but he was long gone. Soscrawny, snotty... That's all right, we'll remember. We'll remebereverything, Your Highness, Uncle Buht. During the father's reighn, I daresay you sat quietly, drank a bit and kept silent, were afraid to be noticed,you knew that King Prostyaga did not forget you ignoble treachery...</div><div>Great was the father, the King thought with an accustomed envy. You'dbe great, if your advisors are God's angels in flesh. All know, all haveseen them: their faces fearful, white, like milk, and their garment weresuch that one could not understand if they were naked or not. And theirarrows were fiery, like lightning, they drove off the nomads with thearrows, and although they casted them overhead, half the horde cripled fromfear. His Highness, Uncle Buht, wispered once upon a time, drunk andburping, that those arrows can be cast by anyone, that special slings areneeded that the angels have and that would be nice to take from them. And hesaid then -- he was drunk then, -- that if it is nice to have, why not haveit, why not... Soon after that table talk one angel fell off the wall intothe moat, probably slipped. Next to him they found one of uncle's bodyguards with a javelin between his shoulder blades. It was a dark, darkdeed... It good that the people did not care about the angels, they werescary to look at, but it is not clear why is it scary -- angels were happy,cordial people. Only their eyes were scary. Small, shiny, and they keepracing around... non humanoid eyes, not peaceful. So the people hushed down,although father, King Prostyaga gave them such freedom that it is shamefulto remember... although, before the Coup, father, they say was a saddlemaker. For saying so, with my own hands I had torn eyes out, and sewen earsshut. But I remember, he used to sit in the evenings by the Crystal Tower,and he would cut out leather -- beautiful work. And I would perch myself athis side, it's warm and comfy... The angels were singing from the rooms, soquietly, and in harmony, and father would start to accompany -- he knewtheir language -- it used to be spacious, nobody around... not like now,guards are stuck at every corner, but there is no sense in it...</div><div>The King lamented. Yes, he was a good father, just that he did not diefor a long time. You can't do that while your son is still alive... The sonis also the King, the son also want's to... But Prostyaga did not age, I'mover fifty,and he still looks younger than me... It looks like the angelshad asked God for his health... They asked for his health, but they forgotabout me. They say that the second one they managed to pin down in thefather's room, he had a sling in each hand, but he did not fight. Beforedeath, they say, he threw both of them out the window, they burst into ablue flame, there was no dust left... Too bad about the slings... AndProstyaga, they say, cried and got drunk then, within an inch of his life --the first time since his reign -- looked for me, they said, loved me,believed...</div><div>The King drew his knees to his chin, and hugged his leggs. So what ifhe believed? One should know one's limit, abdicate, like it is doneelsewhere... and I do not know anything, and do not want to. There was onlya conversation with my uncle, His Highnesss.</div><div>"Prostyaga, -- he said, -- doesn't age". -- "Yes, -- I tell him, -- butwhat can we do, the angels pleaded for his health." Uncle then sneered,scum, and wispered: "Angels, -- he said, -- no longer sing their songshere". And I blurted out: "It is true, but now there is a way to deal withthem, not just with humans". Uncle looked at me soberly, and immediatellyleft... And I didn't really say anything... Empty words, without meaning...And in a week Prostyaga died from a heart attack. So what? It was his time.He looked young, but in reality he was over one hundred. We'll all die...</div><div>The King was startled, and covering himself, awkwardly sat up. Into thetemple came the High Priest Agar. Lay brothers were leading him by thehands. He didn't look at the King, came up to God and kneeled in front ofthe eminence, tall, hunch-backed, with waist length dirty-white hair. TheKing gloated "It's the end of you, Your Highness, you did manage, I'm notlike Prostyaga, you'll ravage your oun intestines, drunken swine..." Agarspoke in a rich voice:</div><div>- God! The King wishes to speak to you! Forgive him and listen!</div><div>The room fell silent, no-one dared to breathe. The King contemplated:when the great flood happened, and the earth burst, Prostyaga asked God tohelp, and God came down from the sky as a ball of flame on the same day, andthat night the earth closed up, and the flood disappeared. It means thatthis is how it will happen today. You were late uncle, Your Highness, youdidn't manage. No one can help you now...</div><div>Agar straighned up. The lay brothers that supported him, jumped away,turned with their backs to God, and covered their heads with their arms. TheKind saw, how Agar stretced his clasped hands and put them on Gods chest.God's eyes lit up. The King snapped his jaw from fear: the eyes were big anddifferent -- one was snakish-green, the other white, as bright as light. Onecould hear how God started to breathe, heavily, with crackling, likeconsumption. Agar backed away.</div><div>- Speak, - he whispered. It looked like he was unsettled as well.</div><div>The King lowered to all fours, and started to crawl to the eminence. Hedid not know what to do or how. And he did not know how he should start andwhether he should tell the complete truth. God breathed heavily, weezing,suddenly he started to whimper, quietly and thinly - scary.</div><div>- I'm the son of Prostyaga -- said the King in despair, smothering hisface against the cold stone. -- Prostyaga died. I ask protection from theconspirators. Prostyaga made mistakes. He did not know what he was doing. Ihave fixed everything: calmed the people, became great and unatainable, likeyou, I gathered an army... And the treacherous Buht is disrupting my plansto conquer the world... He wants to kill me! Help me!</div><div>He raised his head. God, without blinking, was looking in his face withgreen and white. God was silent.</div><div>- Help me... - repeated the King. -- Help! Help! - He suddenly thought,that he is doing something wrong, and that God is indifferent towards him,and inopportunely remembered: they said, his father, Prostyaga, did not diefrom a heart attack, but was killed here, in the temple when the killerscame in, with out asking permission. -- Help!.-- he screemed desperatelly.-- I'm afraid to die today! Help! Help!</div><div>He hunched up on the stone tiles, biting his hands from an unbarableterror. Differently-eyed God hoarsly breathed above his head.</div><div>- Old vermine, - said Tolya. Ernst was quiet. On the screen, throughthe sparks of static an ugly black shape of a human lay splattered on thefloor. -- When I think, Tolya spoke again, -- that if not for him, Alan andDerek would be alive, I want to do something, that you never wanted to do.</div><div>Ernst shrugged his shoulders and moved to the table.</div><div>- And I always think, - Tolya continued, - why didn't Derek shoot? Hecould have killed all...</div><div>- He couldn't , - said Ernst.</div><div>- Why couldn't he?</div><div>- Have you ever tried shooting at a human being?</div><div>Tolya made a wry face, but didn't say anything.</div><div>- Well that's what it was, - said Ernst. -- Try to imagine it. It isalmost as disgusting.</div><div>A sorowful howl was heard from the loudspeaker. "HELP HELP I AM AFRAIDHELP..," the auto-translater was writing.</div><div>- Poor cruel folk... - said Tolya.</div></div></div></div></body></html>
This is sample of content (from one book) – it have pretty much text, right? Soon (at third step) we will apply pagination to our ‘main_content’.
这是内容的样本(来自一本书)–它包含很多文字，对吗？ 很快(第三步)，我们将对我们的“ main_content”应用分页。
步骤2. CSS (Step 2. CSS)
Here are used CSS file with styles of our demo:
以下是带有我们演示样式CSS文件：
css / main.css (css/main.css)
body {background:#eee;margin:0;padding:0;}.example {-moz-border-radius:3px;-webkit-border-radius:3px;background:#FFF;border:1px #000 solid;height:600px;margin:20px auto;padding:15px;position:relative;width:800px;}#main_content {height:50%;left:5%;overflow:auto;position:absolute;top:5%;width:90%;}.ssb_down {background:transparent url(../images/icon-arrow-down.png);bottom:0;cursor:pointer;position:absolute;right:0;}.ssb_sb {background:transparent url(../images/middle.png);cursor:pointer;position:absolute;right:0;}.ssb_sb_down {background:transparent url(../images/middrag.png);}.ssb_sb_over {background:transparent url(../images/midhover.png);}.ssb_st {background:transparent url(../images/back.png);cursor:pointer;height:100%;position:absolute;right:0;top:0;}.ssb_up {background:transparent url(../images/icon-arrow-up.png);cursor:pointer;position:absolute;right:0;top:0;}.parent {font-family:verdana;height:100%;padding:10px;position:relative;}
body {background:#eee;margin:0;padding:0;}.example {-moz-border-radius:3px;-webkit-border-radius:3px;background:#FFF;border:1px #000 solid;height:600px;margin:20px auto;padding:15px;position:relative;width:800px;}#main_content {height:50%;left:5%;overflow:auto;position:absolute;top:5%;width:90%;}.ssb_down {background:transparent url(../images/icon-arrow-down.png);bottom:0;cursor:pointer;position:absolute;right:0;}.ssb_sb {background:transparent url(../images/middle.png);cursor:pointer;position:absolute;right:0;}.ssb_sb_down {background:transparent url(../images/middrag.png);}.ssb_sb_over {background:transparent url(../images/midhover.png);}.ssb_st {background:transparent url(../images/back.png);cursor:pointer;height:100%;position:absolute;right:0;top:0;}.ssb_up {background:transparent url(../images/icon-arrow-up.png);cursor:pointer;position:absolute;right:0;top:0;}.parent {font-family:verdana;height:100%;padding:10px;position:relative;}
步骤3. JS (Step 3. JS)
Here are all JS files:
这是所有JS文件：
js / main.js (js/main.js)
var ssb = {aConts : [],mouseY : 0,N : 0,asd : 0, /*active scrollbar element*/sc : 0,sp : 0,to : 0,// constructorscrollbar : function (cont_id) {var cont = document.getElementById(cont_id);// perform initializationif (! ssb.init()) return false;var cont_clone = cont.cloneNode(false);cont_clone.style.overflow = "hidden";cont.parentNode.appendChild(cont_clone);cont_clone.appendChild(cont);cont.style.position = 'absolute';cont.style.left = cont.style.top = '0px';cont.style.width = cont.style.height = '100%';// adding new container into arrayssb.aConts[ssb.N++] = cont;cont.sg = false;//creating scrollbar child elementscont.st = this.create_div('ssb_st', cont, cont_clone);cont.sb = this.create_div('ssb_sb', cont, cont_clone);cont.su = this.create_div('ssb_up', cont, cont_clone);cont.sd = this.create_div('ssb_down', cont, cont_clone);// on mouse down processingcont.sb.onmousedown = function (e) {if (! this.cont.sg) {if (! e) e = window.event;ssb.asd = this.cont;this.cont.yZ = e.screenY;this.cont.sZ = cont.scrollTop;this.cont.sg = true;// new class namethis.className = 'ssb_sb ssb_sb_down';}return false;}// on mouse down on free track area - move our scroll element toocont.st.onmousedown = function (e) {if (! e) e = window.event;ssb.asd = this.cont;ssb.mouseY = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;for (var o = this.cont, y = 0; o != null; o = o.offsetParent) y += o.offsetTop;this.cont.scrollTop = (ssb.mouseY - y - (this.cont.ratio * this.cont.offsetHeight / 2) - this.cont.sw) / this.cont.ratio;this.cont.sb.onmousedown(e);}// onmousedown eventscont.su.onmousedown = cont.su.ondblclick = function (e) { ssb.mousedown(this, -1); return false; }cont.sd.onmousedown = cont.sd.ondblclick = function (e) { ssb.mousedown(this, 1); return false; }//onmouseout eventscont.su.onmouseout = cont.su.onmouseup = ssb.clear;cont.sd.onmouseout = cont.sd.onmouseup = ssb.clear;// on mouse over - apply custom class name: ssb_sb_overcont.sb.onmouseover = function (e) {if (! this.cont.sg) this.className = 'ssb_sb ssb_sb_over';return false;}// on mouse out - revert back our usual class name 'ssb_sb'cont.sb.onmouseout = function (e) {if (! this.cont.sg) this.className = 'ssb_sb';return false;}// onscroll - change positions of scroll elementcont.ssb_onscroll = function () {this.ratio = (this.offsetHeight - 2 * this.sw) / this.scrollHeight;this.sb.style.top = Math.floor(this.sw + this.scrollTop * this.ratio) + 'px';}// scrollbar widthcont.sw = 20;// start scrollingcont.ssb_onscroll();ssb.refresh();// binding own onscroll eventcont.onscroll = cont.ssb_onscroll;return cont;},// initializationinit : function () {if (window.oper || (! window.addEventListener && ! window.attachEvent)) { return false; }// temp inner function for event registrationfunction addEvent (o, e, f) {if (window.addEventListener) { o.addEventListener(e, f, false); ssb.w3c = true; return true; }if (window.attachEvent) return o.attachEvent('on' + e, f);return false;}// binding eventsaddEvent(window.document, 'mousemove', ssb.onmousemove);addEvent(window.document, 'mouseup', ssb.onmouseup);addEvent(window, 'resize', ssb.refresh);return true;},// create and append div finccreate_div : function(c, cont, cont_clone) {var o = document.createElement('div');o.cont = cont;o.className = c;cont_clone.appendChild(o);return o;},// do clear of controlsclear : function () {clearTimeout(ssb.to);ssb.sc = 0;return false;},// refresh scrollbarrefresh : function () {for (var i = 0, N = ssb.N; i < N; i++) {var o = ssb.aConts[i];o.ssb_onscroll();o.sb.style.width = o.st.style.width = o.su.style.width = o.su.style.height = o.sd.style.width = o.sd.style.height = o.sw + 'px';o.sb.style.height = Math.ceil(Math.max(o.sw * .5, o.ratio * o.offsetHeight) + 1) + 'px';}},// arrow scrollingarrow_scroll : function () {if (ssb.sc != 0) {ssb.asd.scrollTop += 6 * ssb.sc / ssb.asd.ratio;ssb.to = setTimeout(ssb.arrow_scroll, ssb.sp);ssb.sp = 32;}},/* event binded functions : */// scroll on mouse downmousedown : function (o, s) {if (ssb.sc == 0) {// new class nameo.cont.sb.className = 'ssb_sb ssb_sb_down';ssb.asd = o.cont;ssb.sc = s;ssb.sp = 400;ssb.arrow_scroll();}},// on mouseMove binded eventonmousemove : function(e) {if (! e) e = window.event;// get vertical mouse positionssb.mouseY = e.screenY;if (ssb.asd.sg) ssb.asd.scrollTop = ssb.asd.sZ + (ssb.mouseY - ssb.asd.yZ) / ssb.asd.ratio;},// on mouseUp binded eventonmouseup : function (e) {if (! e) e = window.event;var tg = (e.target) ? e.target : e.srcElement;if (ssb.asd && document.releaseCapture) ssb.asd.releaseCapture();// new class nameif (ssb.asd) ssb.asd.sb.className = (tg.className.indexOf('scrollbar') > 0) ? 'ssb_sb ssb_sb_over' : 'ssb_sb';document.onselectstart = '';ssb.clear();ssb.asd.sg = false;}}window.onload = function() {ssb.scrollbar('main_content'); // scrollbar initialization}
var ssb = {aConts : [],mouseY : 0,N : 0,asd : 0, /*active scrollbar element*/sc : 0,sp : 0,to : 0,// constructorscrollbar : function (cont_id) {var cont = document.getElementById(cont_id);// perform initializationif (! ssb.init()) return false;var cont_clone = cont.cloneNode(false);cont_clone.style.overflow = "hidden";cont.parentNode.appendChild(cont_clone);cont_clone.appendChild(cont);cont.style.position = 'absolute';cont.style.left = cont.style.top = '0px';cont.style.width = cont.style.height = '100%';// adding new container into arrayssb.aConts[ssb.N++] = cont;cont.sg = false;//creating scrollbar child elementscont.st = this.create_div('ssb_st', cont, cont_clone);cont.sb = this.create_div('ssb_sb', cont, cont_clone);cont.su = this.create_div('ssb_up', cont, cont_clone);cont.sd = this.create_div('ssb_down', cont, cont_clone);// on mouse down processingcont.sb.onmousedown = function (e) {if (! this.cont.sg) {if (! e) e = window.event;ssb.asd = this.cont;this.cont.yZ = e.screenY;this.cont.sZ = cont.scrollTop;this.cont.sg = true;// new class namethis.className = 'ssb_sb ssb_sb_down';}return false;}// on mouse down on free track area - move our scroll element toocont.st.onmousedown = function (e) {if (! e) e = window.event;ssb.asd = this.cont;ssb.mouseY = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;for (var o = this.cont, y = 0; o != null; o = o.offsetParent) y += o.offsetTop;this.cont.scrollTop = (ssb.mouseY - y - (this.cont.ratio * this.cont.offsetHeight / 2) - this.cont.sw) / this.cont.ratio;this.cont.sb.onmousedown(e);}// onmousedown eventscont.su.onmousedown = cont.su.ondblclick = function (e) { ssb.mousedown(this, -1); return false; }cont.sd.onmousedown = cont.sd.ondblclick = function (e) { ssb.mousedown(this, 1); return false; }//onmouseout eventscont.su.onmouseout = cont.su.onmouseup = ssb.clear;cont.sd.onmouseout = cont.sd.onmouseup = ssb.clear;// on mouse over - apply custom class name: ssb_sb_overcont.sb.onmouseover = function (e) {if (! this.cont.sg) this.className = 'ssb_sb ssb_sb_over';return false;}// on mouse out - revert back our usual class name 'ssb_sb'cont.sb.onmouseout = function (e) {if (! this.cont.sg) this.className = 'ssb_sb';return false;}// onscroll - change positions of scroll elementcont.ssb_onscroll = function () {this.ratio = (this.offsetHeight - 2 * this.sw) / this.scrollHeight;this.sb.style.top = Math.floor(this.sw + this.scrollTop * this.ratio) + 'px';}// scrollbar widthcont.sw = 20;// start scrollingcont.ssb_onscroll();ssb.refresh();// binding own onscroll eventcont.onscroll = cont.ssb_onscroll;return cont;},// initializationinit : function () {if (window.oper || (! window.addEventListener && ! window.attachEvent)) { return false; }// temp inner function for event registrationfunction addEvent (o, e, f) {if (window.addEventListener) { o.addEventListener(e, f, false); ssb.w3c = true; return true; }if (window.attachEvent) return o.attachEvent('on' + e, f);return false;}// binding eventsaddEvent(window.document, 'mousemove', ssb.onmousemove);addEvent(window.document, 'mouseup', ssb.onmouseup);addEvent(window, 'resize', ssb.refresh);return true;},// create and append div finccreate_div : function(c, cont, cont_clone) {var o = document.createElement('div');o.cont = cont;o.className = c;cont_clone.appendChild(o);return o;},// do clear of controlsclear : function () {clearTimeout(ssb.to);ssb.sc = 0;return false;},// refresh scrollbarrefresh : function () {for (var i = 0, N = ssb.N; i < N; i++) {var o = ssb.aConts[i];o.ssb_onscroll();o.sb.style.width = o.st.style.width = o.su.style.width = o.su.style.height = o.sd.style.width = o.sd.style.height = o.sw + 'px';o.sb.style.height = Math.ceil(Math.max(o.sw * .5, o.ratio * o.offsetHeight) + 1) + 'px';}},// arrow scrollingarrow_scroll : function () {if (ssb.sc != 0) {ssb.asd.scrollTop += 6 * ssb.sc / ssb.asd.ratio;ssb.to = setTimeout(ssb.arrow_scroll, ssb.sp);ssb.sp = 32;}},/* event binded functions : */// scroll on mouse downmousedown : function (o, s) {if (ssb.sc == 0) {// new class nameo.cont.sb.className = 'ssb_sb ssb_sb_down';ssb.asd = o.cont;ssb.sc = s;ssb.sp = 400;ssb.arrow_scroll();}},// on mouseMove binded eventonmousemove : function(e) {if (! e) e = window.event;// get vertical mouse positionssb.mouseY = e.screenY;if (ssb.asd.sg) ssb.asd.scrollTop = ssb.asd.sZ + (ssb.mouseY - ssb.asd.yZ) / ssb.asd.ratio;},// on mouseUp binded eventonmouseup : function (e) {if (! e) e = window.event;var tg = (e.target) ? e.target : e.srcElement;if (ssb.asd && document.releaseCapture) ssb.asd.releaseCapture();// new class nameif (ssb.asd) ssb.asd.sb.className = (tg.className.indexOf('scrollbar') > 0) ? 'ssb_sb ssb_sb_over' : 'ssb_sb';document.onselectstart = '';ssb.clear();ssb.asd.sg = false;}}window.onload = function() {ssb.scrollbar('main_content'); // scrollbar initialization}
Binded events, other scrolling functionality – all here. I tried to make comments in many important places.
绑定事件和其他滚动功能–全部都在这里。 我试图在许多重要的地方发表评论。
现场演示
结论 (Conclusion)
Today`s article told you about creating nice customized scrollbar for content. Sure that this was useful for you. Your comments are welcome. Good luck!
今天的文章告诉您有关为内容创建漂亮的自定义滚动条的信息。 确保这对您有用。 欢迎您发表评论。 祝好运！
翻译自: https://www.script-/custom-scrollbars-cross-browser-solution/
浏览器自定义横向滚动条
