asp三级联动无法不能选择，下一级的，不知道怎么修改代码 - ASP技术论坛

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回复楼主 neihe参考参考这个

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.
<html xmlns="http://www.
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>资料录入页面</title>
<script language="JavaScript">
function bb(num){
city = new Array();
city[1]= new Array("西安","1","1");
city[2]= new Array("咸阳","2","1");
city[3]= new Array("宝鸡","3","1");
city[4]= new Array("洛阳","4","2");
city[5]= new Array("郑州","5","2");
city[6]= new Array("开封","6","2");
city[7]= new Array("成都","7","3");
city[8]= new Array("绵阳","8","3");
city[9]= new Array("广元","9","3");
//把数组的值用数据库读出
document.form1.s1.length = 0;
document.form1.s2.length = 0;
document.form1.s2.options[0]= new Option("还没有市","0");
document.form1.s1.options[0]= new Option("请选择市","0");
j=1;
for(i=1;i<=9;i++)
{ if(city[i][2]==num)
{document.form1.s1.options[document.form1.s1.length]= new Option(city[i][0],city[i][1]);}
j++}
}
function cc(num){
city = new Array();
city[1]= new Array("未央区","1","1");
city[2]= new Array("雁塔区","2","1");
city[3]= new Array("灞桥区","3","1");
city[4]= new Array("秦都区","4","2");
city[5]= new Array("渭城区","5","2");
city[6]= new Array("渭滨区","6","3");
city[7]= new Array("金台区","7","3");
city[8]= new Array("陈仓区","8","3");
city[9]= new Array("老城区","9","4");
city[10]= new Array("涧西区","10","4");
city[11]= new Array("西工区","11","4");
city[12]= new Array("中原区","12","5");
city[13]= new Array("惠济区","13","5");
city[14]= new Array("金水区","14","5");
city[15]= new Array("龙亭区","15","6");
city[16]= new Array("金明区","16","6");
city[17]= new Array("鼓楼区","17","6");
city[18]= new Array("青羊区","18","7");
city[19]= new Array("金牛区","19","7");
city[20]= new Array("武侯区","20","7");
city[21]= new Array("游仙区","21","8");
city[22]= new Array("培城区","22","8");
city[23]= new Array("朝天区","23","9");
city[24]= new Array("元坝区","24","9");
//把数组的值用数据库读出
document.form1.s2.length = 0;
document.form1.s2.options[0]= new Option("请选择区","0");
j=1;
for(i=1;i<=24;i++)
{ if(city[i][2]==num)
{document.form1.s2.options[document.form1.s2.length]= new Option(city[i][0],city[i][1]);}
j++}
}
</script>

<script language="javascript">
function show(){
    var obj=document.getElementByid("s2");
    alert(obj.value);
}
</script>
</head>

<body>
<form method="POST" action="<%=MM_editAction%>" name="form1" >
  <table align="center"  >
    <tr valign="baseline">
      <td nowrap align="right"><span class="STYLE4">籍贯：</span></td>
      <td>
      <select name="ss" class="STYLE4" onChange="bb(document.form1.ss.options[document.form1.ss.selectedIndex].value)" >
      <option value="0">请选择省</option>
      <option value="1">陕西</option>
      <option value="2">河南</option>
      <option value="3">四川</option>
      </select>
      <select name="s1" class="STYLE4" onChange="cc(document.form1.s1.options[document.form1.s1.selectedIndex].value)">
      </select>
      <select name="s2"  class="STYLE4" id="s2" onchange="show()">
      </select>
      </td>
    </tr>
  </table>
</form>
<p> </p>
</body>
</html>