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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>合并表格</title>
<script type="text/javascript">
var mergeTable = function () {
var table = document.getElementById("table1");
var tempArray = new Array();
var rowList = table.getElementsByTagName("tr");
for (var i = 0; i < rowList.length; i++) {
var data = rowList[i].getElementsByTagName("td");
if (tempArray != null && tempArray.length > 0) {
for (var k = 0; k < tempArray.length; k++) {
if (tempArray[k][0].innerHTML === data[0].innerHTML) {
rowList[i].parentNode.removeChild(rowList[i]);
continue;
}
}
}
tempArray.push(data);
}
};
</script>
</head>
<body>
<table width="400" border="1" id="table1">
<tr>
<td>a</td>
<td>if</td>
<td>100</td>
<td>200</td>
<td>3</td>
</tr>
<tr>
<td>b</td>
<td>for</td>
<td>300</td>
<td>230</td>
<td>4</td>
</tr>
<tr>
<td>a</td>
<td>if</td>
<td>100</td>
<td>200</td>
<td>3</td>
</tr>
</table>
<br><input type="button" value="合并表格" onclick="mergeTable()">
</body>
</html>