jsp中报对象不支持此属性错误！

function GetAllDevName()
{
var selectObj = document.getElementById("devList");
if(selectObj == undefined) return; var strDevName = form1.ggcom.GetAllDevName();
var strDevNameArr=strDevName.split(";");
for(i=0;i<strDevNameArr.length;i++)
{
selectObj.options.add(new Option(strDevNameArr[i],i));
}
}
报错指向这个方法的第一行，请高手手指点，静态的html可以执行成功，但是当做jsp部署到tamcat中，在访问就报错！如果不详细可以附上代码！

解决方案 »

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<table width="900" height="500" border="0" cellpadding="0" cellspacing="0">
<form name="form1">
<tr>
    <td><table width="180" height="100%" bgcolor="#CEE1C4" valign="top">
      <tr>
        <td height="40" align="center" valign="middle">影像设备列表<select id=devList onChange = SetCameraID(this.value) style="width:98%"></select></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle">设备分辨率<select id=resList onChange = SetResolution(this.options[this.selectedIndex].text) style="width:98%"></select></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle">图片路径<input name="savePath" value="C:\" style="width:140"><input id=browse type="button" value="..." onclick=BrowseFolder()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=start type="button" value="  预    览 " onClick=Start()></td>
      </tr>
<td height="40" align="center" valign="middle"><input type="checkbox" name="是否裁边" onClick=CutBlackMargin()>是否裁边</td>
      <tr>
        <td height="40" align="center" valign="middle"><input id=getPic type="button" value="  拍    图 " onClick=GetPic()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=stop type="button" value="  关    闭 " onClick=Stop()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=option type="button" value="  设    置 " onClick=ShowSetup()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=toolbar type="button" value="  工具条 " onClick=ShowToolBar()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=about type="button" value="  关    于 " onClick=ShowAboutBox()></td>
      </tr>
      <tr><td height="100%"></td></tr></table>
   </td>
<td width="100%" valign="top">
<OBJECT id="ggcom" classid="clsid:5026E632-AE63-4094-8981-9CE9EE9EA003" width="100%" height="100%" CODEBASE="GGCamera.CAB#version=1,0,0,0">
<param name="_Version" value="65536">
<param name="_ExtentX" value="2646">
<param name="_ExtentY" value="1323">
<param name="_StockProps" value="0">
</object>
</td>
</tr>
<tr><td height="10">
</tr>
</form>
</table>
是不是你这个方法前面的HTML代码不正确？
或者是引用了其他的JS，JS语法错误导致这个错误？
不知道你的jsp是不是嵌入在frame中的，用调试工具跟踪下你的document是指向哪的
我把代码附上，帮忙看下吧，谢谢了。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    <style type="text/css">
</style>
    <title>My JSP '1234.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
  </head>
<script type="text/javascript">

window.onload=function()
{
        GetDevResolution();
GetAllDevName();
}

</script>
  <script language="javascript" type="text/JavaScript">
var bShow = 0;
var nCount = 0;
var bAddText = 0;
var bRotate = 0;
var checked = 0;function CutBlackMargin()
{
var obj = document.getElementsByTagName("input");
         for(var i = 0; i < obj.length; i++)
         {
          var cb = obj[i];
                if (cb.type== "checkbox")
                {
                 if (cb.checked)
                         form1.ggcom.ClrBlackMargin = 1;  //裁边
else
form1.ggcom.ClrBlackMargin = 0;
                 }
            }
}function GetPic()
{
nCount = nCount + 1;
var strFolderPath = document.getElementById("savePath").value;
if(strFolderPath.charAt(strFolderPath.length-1) != "//")
strFolderPath = strFolderPath + "//";
var strfilePath = strFolderPath + padLeft(nCount,3) + ".jpg";

form1.ggcom.GetRectPic2(strfilePath,60,0,0,0,0,0);
}function ShowToolBar()
{
if (bShow == 0)
{
form1.ggcom.ShowToolbar(0);
bShow = 1;
}
else
{
form1.ggcom.ShowToolbar(1);
bShow = 0;
}

}function ShowSetup()
{
form1.ggcom.ShowSetup();
}function Start()
{
var objDevice = document.getElementById("devList");
if(objDevice == undefined) return;
SetCameraID(objDevice.options[objDevice.selectedIndex].value); var objResolution = document.getElementById("resList");
if(objResolution == undefined) return;
SetResolution(objResolution.options[objResolution.selectedIndex].text)
// form1.ggcom.ClrBlackMargin = 1;  //裁边
}function Stop()
{
form1.ggcom.Stop();
}function ShowAboutBox()
{
form1.ggcom.AboutBox();
}function GetAllDevName()
{
var strDevName = form1.ggcom.GetAllDevName();
var strDevNameArr=strDevName.split(";");
var selectObj = document.getElementById("devList");
if(selectObj == undefined) return; for(i=0;i<strDevNameArr.length;i++)
{
selectObj.options.add(new Option(strDevNameArr[i],i));
}
}function SetCameraID(ID)
{
form1.ggcom.Stop();
form1.ggcom.CurCameraID = ID;        GetDevResolution();

}function GetDevResolution()
{
var selectObj = document.getElementById("resList");
if(selectObj == undefined) return;
selectObj.innerHTML = ""; var strResolution = form1.ggcom.GetDevAllResolution1(form1.ggcom.CurCameraID);
var strResolutionArr = strResolution.split(";");
for(i=0;i<strResolutionArr.length;i++)
{
selectObj.options.add(new Option(strResolutionArr[i],i));
}
}function SetResolution(txt)
{
form1.ggcom.Stop();
        var i = txt.indexOf("x");
        var j = txt.indexOf("(");
var k = txt.indexOf(")");
var width = txt.substring(0,i);
var height = txt.substring(i+1,j);
var bitcount = txt.substring(j+1,k);

var state =  0;
        state=form1.ggcom.SetPrevResolution(width,height,bitcount);
     if( state == 1 )
{
// form1.ggcom.ClrBlackMargin = 1;  //裁边
form1.ggcom.Start();
}
        else
alert("不支持当前设置");
} function BrowseFolder()
{
try
{
var Message = "请选择文件夹";  //选择框提示信息
var Shell = new ActiveXObject( "Shell.Application" );
var Folder = Shell.BrowseForFolder(0,Message,0x0040,0x11);//起始目录为：我的电脑
//var Folder = Shell.BrowseForFolder(0,Message,0); //起始目录为：桌面
if(Folder != null)
{
Folder = Folder.items();  // 返回 FolderItems 对象
Folder = Folder.item();  // 返回 Folderitem 对象
Folder = Folder.Path;   // 返回路径
document.all.savePath.value=Folder;
return Folder;
}
}
catch(e)
{
alert(e.message);
}
}function padLeft(str,lenght)
{
if(str.length >= lenght)
return str;
else
return padLeft("0" +str,lenght);
} </script>
  <body>

<div>
<img src="indexbg.jpg" width="900" height="56">
</div>
<form name="form1">
<table width="900" height="500" border="0" cellpadding="0" cellspacing="0"> <tr>
    <td><table width="180" height="100%" bgcolor="#CEE1C4" valign="top">
      <tr>
        <td height="40" align="center" valign="middle">影像设备列表<select id=devList onChange = SetCameraID(this.value) style="width:98%"></select></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle">设备分辨率<select id=resList onChange = SetResolution(this.options[this.selectedIndex].text) style="width:98%"></select></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle">图片路径<input name="savePath" value="C:\" style="width:140"><input id=browse type="button" value="..." onclick=BrowseFolder()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=start type="button" value="  预    览 " onClick=Start()></td>
      </tr>
  <tr>
    <td height="40" align="center" valign="middle"><input type="checkbox" name="是否裁边" onClick=CutBlackMargin()>是否裁边</td>
       </tr>
  <tr>
        <td height="40" align="center" valign="middle"><input id=getPic type="button" value="  拍    图 " onClick=GetPic()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=stop type="button" value="  关    闭 " onClick=Stop()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=option type="button" value="  设    置 " onClick=ShowSetup()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=toolbar type="button" value="  工具条 " onClick=ShowToolBar()></td>
      </tr>
      <tr>
        <td height="40" align="center" valign="middle"><input id=about type="button" value="  关    于 " onClick=ShowAboutBox()></td>
      </tr>
      <tr><td height="100%"></td></tr></table>
   </td>
<td width="100%" valign="top">
<OBJECT id="ggcom" classid="clsid:5026E632-AE63-4094-8981-9CE9EE9EA003" width="100%" height="100%" CODEBASE="GGCamera.CAB#version=1,0,0,0">
<param name="_Version" value="65536"/>
<param name="_ExtentX" value="2646"/>
<param name="_ExtentY" value="1323"/>
<param name="_StockProps" value="0"/>
</object>
</td>
</tr>
<tr><td height="10"></td>
</tr>
</table>
</form>
  </body>
</html>
我调试了一下，报错应该是在SetCameraID(objDevice.options[objDevice.selectedIndex].value);或者之后，第一句是可以执行通过的
差不多吧，都是这个方法报错，纠结一天了，好像就是document，或者form对象没有获取到
你把objDevice.options[objDevice.selectedIndex].value值打出来看看，是不是页面没option值导致的报错