小问题,急手!!!~~~

if (document.UserForm.UID[i].Checked) ------------------>if (document.UserForm.UID[i].checked)

解决方案 »

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if (document.UserForm.UID[i].Checked)
改成
------------------>if (document.UserForm.UID[i].checked)因为你的Check中的c是大写的
该成小写的就好了
js大小写敏感
哦,不好意思.但是我改了以后还是不行.麻烦您帮忙看一下
----
1.htm
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<script>
var answer = window.showModalDialog("2.htm","","dialogHeight: 258px; dialogWidth: 318px; dialogTop: px; dialogLeft: px; center: Yes; help: No; resizable: No; status: No;scrollbar:Yes");
//document.all.struser.value=answer
for(i=0;i<answer.length;i++) alert(answer[i])</script>
<body bgcolor="#FFFFFF" text="#000000"></body>
</html>
---------
2.htm<link rel="stylesheet" href="/IT/Asset/asset.css" type="text/css">
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0">

<table width="276" border="0" cellspacing="0" cellpadding="0" height="213">
  <tr>
    <td valign="top">
      <table width="100%" border="0" cellspacing="2" cellpadding="2">
        <tr>
          <td colspan="4"> </td>
        </tr>
        <form name="UserForm" method="post" action="">
          <tr>
            <td colspan="4">Please select one user below </td>
          </tr>
          <tr bgcolor="#E2F3E3">
            <td>
              <div align="center"><b><font size="1">First Name</font></b></div>
            </td>
            <td>
              <div align="center"><b><font size="1">Last Name</font></b></div>
            </td>
            <td>
              <div align="center"><b><font size="1">Dept.</font></b></div>
            </td>
            <td>
              <div align="center"><b><font size="1">Location</font></b></div>
            </td>
          </tr>
          <tr>
            <td colspan="4">
              <hr noshade size="1">
            </td>
          </tr>
          <tr>
            <td align=center>
              <input type="radio" name="UID" value=1 >
              AAA</td>
            <td align=center>AAA</td>
            <td align=center>IT</td>
            <td align=center>Shanghai</td>
          </tr>
          <tr>
            <td align=center>
              <input type="radio" name="UID" value=3 >
              BBB</td>
            <td align=center>BBB</td>
            <td align=center>Sales</td>
            <td align=center>Beijing</td>
          </tr>
          <tr>
            <td align=center> </td>
            <td align=center> </td>
            <td align=center colspan="2">
              <input type="button" name="Submit" value="Ok..." onclick="UserSearch()">
              <input type="reset" name="Submit2" value="Reset">
            </td>
          </tr>
        </form>
      </table>
    </td>
  </tr>
</table>
<SCRIPT>
function UserSearch()
{
for (var i = 0; i < document.UserForm.UID.length; i++) {
      if (document.UserForm.UID[i].checked) {
         window.returnValue=document.UserForm.UID[i].value;
    }
}
//alert(window.returnValue)
window.close();
}
</script>
</body>
1.html
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<script>
var answer0 = window.showModalDialog("2.html","","dialogHeight: 258px; dialogWidth: 318px; dialogTop: px; dialogLeft: px; center: Yes; help: No; resizable: No; status: No;scrollbar:Yes");
//document.all.struser.value=answer
alert(answer0)</script>
<body bgcolor="#FFFFFF" text="#000000"></body>
</html>你的answer0的长度为零。所以你用length是取不到值的，当长度大于1的时候你才可以用length来取值