<html><head><title>This is a test!</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"></head><body><form name="frm"><select id="s1" onChange="redirec(this.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 id="s2"><option value="请选择" selected>请选择</option></select></form><script language="javascript">var s1=document.getElementById("s1");var s2=document.getElementById("s2");var select2=new Array();for (i=0; i<s1.length; i++)...{ select2[i] = new Array();}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(index)...{s2.length=0; for(i=0;i<select2[index].length;i++)...{ s2.options.add(select2[index][i]) }s2.options[0].selected=true;}</script></body></html>