js必须等表格加载完成后调用。 效果如图：
js代码：
function uniteTable(tableId,colLength) {
//colLength-- 需要合并单元格的列1开始
var tb=document.getElementById(tableId);
tb.style.display='';
var i = 0;
var j = 0;
var rowCount = tb.rows.length; // 行数
var colCount = tb.rows[0].cells.length; // 列数
var obj1 = null;
var obj2 = null;
var obj3 = null;
//为每个单元格命名
for (i = 0; i < rowCount; i++) {
for (j = 0; j < colCount; j++) {
tb.rows[i].cells[j].id = "tb__" + i.toString() + "_" + j.toString();
}
}
//合并行
for (i = 0; i < colCount; i++) {
if (i == colLength) break;
obj1 = document.getElementById("tb__0_" + i.toString())
for (j = 1; j < rowCount; j++) {
obj2 = document.getElementById("tb__" + j.toString() + "_" + i.toString());
if (obj1.innerText == obj2.innerText) {
obj1.rowSpan++;
obj2.parentNode.removeChild(obj2);
} else {
obj1 = document.getElementById("tb__" + j.toString() + "_" + i.toString());
}
}
}
//合并列
for (i = 0; i < rowCount; i++) {
colCount = tb.rows[i].cells.length;
obj1 = document.getElementById(tb.rows[i].cells[0].id);
for (j = 1; j < colCount; j++) {
if (j >= colLength) break;
if (obj1.colSpan >= colLength) break;
obj2 = document.getElementById(tb.rows[i].cells[j].id);
if (obj1.innerText == obj2.innerText) {
obj1.colSpan++;
obj2.parentNode.removeChild(obj2);
j = j - 1;
}
else {
obj1 = obj2;
j = j + obj1.rowSpan;
}
}
}
}
优化后的效果(这里只实现了合并行)： 效果图如下：
代码如下：
function uniteTable(tableId,colLength) {
//colLength-- 需要合并单元格的列1开始
var tb=document.getElementById(tableId);
tb.style.display='';
var i = 0;
var j = 0;
var rowCount = tb.rows.length; // 行数
var colCount = tb.rows[0].cells.length; // 列数
var obj1 = null;
var obj2 = null;
var obj3 = null;
//为每个单元格命名
for (i = 0; i < rowCount; i++) {
for (j = 0; j < colCount; j++) {
tb.rows[i].cells[j].id = "tb__" + i.toString() + "_" + j.toString();
}
}
//合并行 (列循环)第一行第一列均从0开始
for (i = 0; i < colCount; i++) {
//如果第3，4，5列不进行合并操作
if (i == 2 || i == 3 || i == 4) continue;
obj1 = document.getElementById("tb__0_" + i.toString())
//(行循环)
for (j = 1; j < rowCount; j++) {
obj2 = document.getElementById("tb__" + j.toString() + "_" + i.toString());
if(i == 0){//第1列全部进行合并操作
if (obj1.innerText == obj2.innerText) {//判断值是否相等
obj1.rowSpan++;//合并行
obj2.parentNode.removeChild(obj2);//移除被合并的行
} else {
obj1 = document.getElementById("tb__" + j.toString() + "_" + i.toString());
}
}else if(i == 5){//第6列合并操作参照第2列，第二列合并了，第5列才进行合并
obj3 = document.getElementById("tb__" + j.toString() + "_" + (i-4).toString());
if (obj1.innerText == obj2.innerText && obj3 == null) {
obj1.rowSpan++;
obj2.parentNode.removeChild(obj2);
} else {
obj1 = document.getElementById("tb__" + j.toString() + "_" + i.toString());
}
}else{//只有前一列进行了合并操作后面的才会进行合并操作
obj3 = document.getElementById("tb__" + j.toString() + "_" + (i-1).toString());
if (obj1.innerText == obj2.innerText && obj3 == null) {
obj1.rowSpan++;
obj2.parentNode.removeChild(obj2);
} else {
obj1 = document.getElementById("tb__" + j.toString() + "_" + i.toString());
}
}
}
}
}
