js里重复定义变量是允许的<script type="text/javascript">
function test(){
var form = document.forms["form"];
var myTable = document.getElementById("myTable");
var myTR =myTable.insertRow();
var myTD=myTR.insertCell();
myTD.innerText = form.txt.value;
var myTD=myTR.insertCell();
myTD.innerHTML= '<input type="button" name="name" value="删除" >';
}
</script>
<form id="form" name="form">
<input type="text" id="txt" name="txt" />
<input type="button" value="Test" onclick="test()" />
<table width="400" id="myTable">
<tr>
<td></td>
</tr>
</table>
</form>
function test(){
var form = document.forms["form"];
var myTable = document.getElementById("myTable");
var myTR =myTable.insertRow();
var myTD=myTR.insertCell();
myTD.innerText = form.txt.value;
var myTD=myTR.insertCell();
myTD.innerHTML= '<input type="button" name="name" value="删除" >';
}
</script>
<form id="form" name="form">
<input type="text" id="txt" name="txt" />
<input type="button" value="Test" onclick="test()" />
<table width="400" id="myTable">
<tr>
<td></td>
</tr>
</table>
</form>
<!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>DOM动态增删</title>
<script type="text/javascript">
/*
* Author: csser.com | popcg.com
* mail: [email protected]
*/
var count = 0;
function Add(){
count += 1;
var File1 = document.getElementById("file1");
var div = document.createElement("div");
var countTxt = document.createTextNode("文本框"+count);
var inputTxt = document.createElement("input");
inputTxt.type = "text";
inputTxt.name = "txt"+count;
var btn = document.createElement("input");
btn.type = "button";
btn.value = "取消";
btn.onclick = function(){
this.parentNode.parentNode.removeChild(this.parentNode);
var str = File1.innerHTML;
var re = /[^<]+/i;
var n = File1.getElementsByTagName("div");
for(var k=0;k<n.length;k++){
n[k].innerHTML = n[k].innerHTML.replace(re,"文本框"+(k+1));
n[k].getElementsByTagName("input").item(1).onclick = this.onclick;
}
count -= 1;
}
div.appendChild(countTxt);
div.appendChild(inputTxt);
div.appendChild(btn);
File1.appendChild(div);
}
</script>
</head>
<body><input type="button" name="button" value="增加" onclick="Add();" />
<div id="file1"></div>
</body>
</html>