Author:zfive5(zhaozidong)
Email :zfive5@yahoo.com.cn
礼拜五下午公司网站维护的同事问我怎样实现一个功能，一个提
交页上有两个select，第二个select根据第一个select变，我的
第一念头就是用ajax！
test.htm:
<html>
<head>
<script type="text/javascript">
var xmlhttp;
function GetContent(param)
{
url="";
if(window.ActiveXObject)
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
}
if(param==0)
{
url="zfive5.htm";
}
else
{
url="zfive6.htm";
}
xmlhttp.open("GET",url);
xmlhttp.onreadystatechange=oncallback;
xmlhttp.send(url);
}
function oncallback()
{
if(xmlhttp.readyState==4)
{
if(xmlhttp.status==200)
{
document.getElementById("zfive5").innerHTML=xmlhttp.responseText;
}
}
}
</script>
</head>
<body>
<form method="get" id="zf5" action="#">
<table>
<tr>
<td>
Type:<select id="name1" onchange="javascript:GetContent(this.selectedIndex);" >
<option value="1" selected>1.zfive5</option>
<option value="2">2.zfive6</option>
</select>
</td>
<td id=zfive5>
Person:<select id="name2" NAME="name2">
<option value="zfive5">zfive5</option>
<option value="zqqa">zqqa</option>
</select>
</td>
</tr>
</table>
</form>
</body>
</html>
zfive5.htm:
Person:<select id="name2">
<option value="zfive5">zfive5</option>
<option value="zqqa">zqqa</option>
</select>
zfive6.htm:
Person:<select id="name2">
<option value="zfive6">zfive6</option>
<option value="zqqa">zqqa</option>
</select>
效果不错！！！
笔记本内存升1G了!
