Javascript无法在Firefox中运行，但在IE中可以正常工作.

问题描述：

function GetData()
 {
  var objXML,bNewData,strUserID,strCoID,strAdmin;
  var strUserName,bNewData;
  var strSQL,objNode,xmlDoc;
  var xmlhttp;
  var objNode,objNodes;
  strUserID = Form1.txtUserID.value;
  strCoID= Form1.txtCoID.value;
  strAdmin= Form1.chkIsAdmin.checked;
  doClearTable(document.all.tblUsers);
  strSQL = 'url';
  bNewData = false;
  if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
   else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
   xmlhttp.open("GET",strSQL,false);
   xmlhttp.send();
 xmlDoc=xmlhttp.responseXML;
   objNodes=xmlhttp.evaluate(xmlDoc,xmlhttp,null,null,null);
   for(objNode=0; objNode<objNodes.length; objNode++)
   {
        strUserName=objNodes[objNode].selectSingleNode("UserName").text;
        strUserID=objNodes[objNode].selectSingleNode("ID").text;
        doAddSingleUserRow(strUserName,tblUsers,strUserID);
    }
 }

//

上面的Javascript方法在IE中工作正常，但在Firefox中不工作.

如果有人能解决?在Firefox中，ResponseXML给出了undefined.

Above Javascript method is working fine in IE but not working in Firefox.

If anyone can solve? In Firefox, ResponseXML gives undefined.

答

好，您对XMLHttprequest的实现还不完整.在尝试访问/使用responseXML之前，您需要检查各种状态.

请查看以下链接，以了解有关实现的更多信息以及应该在其中进行的各种检查:
XMLHttpRequest对象 [带有示例的XMLHTTPRequest [使用XML HTTP请求对象 [

Well, your implementation of XMLHttprequest is not entirely complete. You need to check for various status before trying to access/use the responseXML.

Have a look at these links to know more about the implementation and various checks that should be there:
XMLHttpRequest Object[^]
XMLHTTPRequest with Sample[^]
Using the XML HTTP Request object[^]

用"xmlHttp.responseText"替换"xmlhttp.responseXML"

Replace "xmlhttp.responseXML" by "xmlHttp.responseText"

Javascript无法在Firefox中运行，但在IE中可以正常工作.

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