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两个关联的列表有关问题(~)

日期：2014-05-16　 浏览次数：20518 次

两个关联的列表问题(~~~~急急急急急!!!!!!~~~~~)


<script language = "JavaScript">
var onecount;
onecount=0;
subcat = new Array();
   
subcat[0] = new Array("张","5","5");
   
subcat[1] = new Array("王","6","6");
   
subcat[2] = new Array("李","5","20");
   
subcat[3] = new Array("zch","5","31");
   
onecount=4;

function changelocation(locationid)
  {
  document.form1.sid.length = 0;

  var locationid=locationid;
  var i;
  for (i=0;i < onecount; i++)
  {
  if (subcat[i][1] == locationid)
  { 
  document.form1.sid.options[document.form1.sid.length] = new Option(subcat[i][0], subcat[i][2]);
  }  
  }
   
  }  
</script>

</head>


<form name="form1" method="post" action="">
<table width="100%" >
  <tr bgcolor="#FFFFFF">
  <td >
  <div align="left">
  <select size="1" name="bid" onChange="changelocation(document.form1.bid.options[document.form1.bid.selectedIndex].value)">
  <option>选择</option>
  <option value=5>张家</option>
   
  <option value=6>王家</option>
   
  <option value=9>胡家</option>
   
   
  </select>
  <select name="sid" onChange="change(document.form1.sid.options[document.form1.sid.selectedIndex].value)" style='width:147;background-color:white;font-size:12;color:black; height:18' size="1"> 
  <option selected>z</option>
  </select>
  <input name="1" type="submit" value="1"></div></td>
  </tr>
  </table>  
  </form>
 两个相互关联的列表,我在第一个列表选择了"张家",第二个选择"李",浏览器就提示错误
行:54
错误:缺少对象


------解决方案--------------------
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>

<body>

<script language = "JavaScript" >
var onecount;
onecount=0;
subcat = new Array();

subcat[0] = new Array("张","5","5");

subcat[1] = new Array("王","6","6");

subcat[2] = new Array("李","5","20");

subcat[3] = new Array("zch","5","31");

onecount=4;

function changelocation(locationid)
{
document.form1.sid.length = 0;

var locationid=locationid;
v

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