<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文檔 </title>
</head>
<body>
<table width="100%" border="1" cellspacing="0" cellpadding="0" id="tab">
<tr>
<td>張三 </td>
<td>男 </td>
<td>22 </td>
<td>數學 </td>
<td>90 </td>
</tr>
<tr>
<td>張三 </td>
<td>男 </td>
<td>22 </td>
<td>數學 </td>
<td>90 </td>
</tr>
<tr>
<td>張三 </td>
<td>男 </td>
<td>22 </td>
<td>語文 </td>
<td>70 </td>
</tr>
<tr>
<td>張三 </td>
<td>女 </td>
<td>22 </td>
<td>英語 </td>
<td>60 </td>
</tr>
<tr>
<td>李四 </td>
<td>女 </td>
<td>22 </td>
<td>數學 </td>
<td>60 </td>
</tr>
<tr>
<td>李四 </td>
<td>女 </td>
<td>19 </td>
<td>語文 </td>
<td>60 </td>
</tr>
<tr>
<td>王五 </td>
<td>男 </td>
<td>19 </td>
<td>英語 </td>
<td>60 </td>
</tr>
</table>
<script type="text/javascript">
window.onload = function(){
var tab = document.getElementByIdx_x_x("tab");
var maxCol = 3, val, count, start; //maxCol:合併單元格作用到多少列
for(var col = maxCol-1; col >= 0 ; col--){
count = 1;
val = "";
for(var i=0; i<tab.rows.length; i++){
if(val == tab.rows[i].cells[col].innerHTML){
count++;
}else{
if(count > 1){ //合併
start = i - count;
tab.rows[start].cells[col].rowSpan = count;
for(var j=start+1; j<i; j++){
tab.rows[j].cells[col].style.display = "none";
}
count = 1;
}
val = tab.rows[i].cells[col].innerHTML;
}
}
if(count > 1 ){ //合併,最後幾行相同的情況下
start = i - count;
tab.rows[start].cells[col].rowSpan = count;
for(var j=start+1; j<i; j++){
tab.rows[j].cells[col].style.display = "none";
}
}
}
};
</script>
</body>
</html>