相应的一些改动可以自己设置。
<script>window.alert = function(str) { var shield = document.createElement("DIV"); shield.id = "shield"; shield.style.position = "absolute"; shield.style.left = "0px"; shield.style.top = "0px"; shield.style.width = "100%"; shield.style.height = document.body.scrollHeight+"px"; shield.style.height = "100%"; //弹出对话框时的背景颜色 shield.style.background = "#000"; shield.style.textAlign = "center"; shield.style.zIndex = "25"; shield.style.opacity = "0.5"; //背景透明 IE有效 //shield.style.filter = "alpha(opacity=0)"; var alertFram = document.createElement("DIV"); alertFram.id="alertFram"; alertFram.style.position = "absolute"; alertFram.style.left = "50%"; alertFram.style.top = "50%"; alertFram.style.marginLeft = "-225px"; alertFram.style.marginTop = "-75px"; alertFram.style.width = "350px"; alertFram.style.height = "150px"; alertFram.style.background = "#ff0000"; alertFram.style.textAlign = "center"; alertFram.style.lineHeight = "150px"; alertFram.style.zIndex = "300"; strHtml = "<ul style=\"list-style:none;margin:0px;padding:0px;width:100%\">\n"; strHtml += " <li style=\"background:#f1f1f1;text-align:left;padding-left:20px;font-size:14px;font-weight:bold;height:40px;color:#000;line-height:40px;border:0;border-bottom:1px solid #ccc; \">提示</li>\n"; strHtml += " <li style=\"background:#fff;text-align:center;font-size:15px;height:100px;line-height:100px;border:1px solid #fff;border-bottom:0;\">"+str+"</li>\n"; strHtml += " <li style=\"background:#fff;text-align:center;font-weight:bold;height:55px;line-height:25px; border:1px solid #fff;border-top:0;\"><input type=\"button\" value=\"确 定\" οnclick=\"doOk()\" style=\"border:0;background:#7ac0f1;color:#fff;width:100px;height:36px;border-radius:5px; \" /></li>\n"; strHtml += "</ul>\n"; alertFram.innerHTML = strHtml; document.body.appendChild(alertFram); document.body.appendChild(shield); this.doOk = function(){ alertFram.style.display = "none"; shield.style.display = "none"; } alertFram.focus(); document.body.onselectstart = function(){return false;}; } </script>
