<html>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
<title>
javascript二级下拉列表框
</title>
<mce:script language=”javascript”><!–
//var select1_len = document.frm.s1.options.length;
var select2 = new Array(4);
for (i=0; i<4; i++)
{
select2[i] = new Array();
}
//定义基本选项
select2[0][0] = new Option(“请选择”, ” “);
select2[1][0] = new Option(“PHP”, ” “);
select2[1][1] = new Option(“ASP”, ” “);
select2[1][2] = new Option(“JSP”, ” “);
select2[2][0] = new Option(“C/C++”, ” “);
select2[2][1] = new Option(“Java”, ” “);
select2[2][2] = new Option(“C#”, ” “);
select2[3][0] = new Option(“Perl”, ” “);
select2[3][1] = new Option(“Ruby”, ” “);
select2[3][2] = new Option(“Python”, ” “);
function redirec(x)
{
var temp = document.frm.s2;
temp.length=0;
for (i=0;i<select2[x].length;i++)
{
temp.options[i]=new Option(select2[x][i].text,select2[x][i].value);
}
temp.options[0].selected=true;
}
// –></mce:script>
</head>
<body>
<form name=”frm”>
<select name=”s1″ onChange=”redirec(this.options.selectedIndex)”>
<option selected>请选择</option>
<option value=”1″>脚本语言</option>
<option value=”2″>高级语言</option>
<option value=”3″>其他语言</option>
</select>
<select name=”s2″>
<option value=”请选择” selected>请选择</option>
</select>
</form>
</body>
</html>