firefox下级联下拉框

Question

if(window.ActiveXObject){
        oHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
        oDoc = new ActiveXObject("MSXML2.DOMDocument");    //响应结果        oHttpReq.open("post","function/Default.aspx?id="+state, false);
        oHttpReq.send("");
        result = oHttpReq.responseText;
        oDoc.loadXML(result);        
        
    }else if(window.XMLHttpRequest){    
        oHttpReq = new XMLHttpRequest();      
        oHttpReq.open("post","function/Default.aspx?id="+state, false);      
        oHttpReq.send(null);        
        result = oHttpReq.responseText;
        //var str = '<?xml version="1.0" encoding="utf-8" ?>';
       // result = str+result;
        alert(result);
        oDoc = document.implementation.createDocument("","",null); 
        oDoc.async   =   false;  
        oDoc.load(result);        
    }    
        items = oDoc.selectNodes("//address");        for (var item = items.nextNode();item;item = items.nextNode())
        {　
            var SectionName = item.childNodes[1].nodeTypedValue;            var newOption = document.createElement("OPTION");　
            newOption.text = SectionName;　
            newOption.value = drp2.options.length;　
            drp2.options.add(newOption);　
        } 　IE中可行，FF中 items开始就得不到数据了。望高手帮忙看下。

Answer 1

function createXMLHttpRequest() 
        { 
            if(xmlHttp == null){
                if(window.XMLHttpRequest) {
                    //Mozilla 浏览器
                    xmlHttp = new XMLHttpRequest();
//                    if (xmlHttp.overrideMimeType) {
//                        //设置MiME类别
//                        xmlHttp.overrideMimeType("text/xml");
//                    }
                }else if(window.ActiveXObject) {
                    // IE浏览器
                    try {
                        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
                    } catch (e) {
                        try {
                            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
                        } catch (e) {
                        }
                    }
                }
            }
        } 

Answer 2

把 
oHttpReq = new ActiveXObject("Microsoft.XMLHTTP"); 
这个换了

Answer 3

http://blog.csdn.net/Sandy945/archive/2009/06/29/4307710.aspx

Answer 4

直接用jquerey的Ajax方法不是很好！

Answer 5

var xmlHttp = null;
function getXmlHttp(){
    if(window.XMLHttpRequest){
        xmlHttp = new XMLHttpRequest();
    }else if(window.ActiveXObject){
        var arrXmlHttpTypes = ['MSXML2.XMLHTTP.6.0','MSXML2.XMLHTTP.3.0','Microsoft.XMLHTTP'];
        for(var i=0;i<arrXmlHttpTypes.length;i++){
            try{
                xmlHttp = new ActiveXObject(arrXmlHttpTypes[i]);
            }catch(ex){}
        }
    }
}//mf 
if (window.XMLHttpRequest) //mf 
{ 
xmlhttp=new XMLHttpRequest() 
xmlhttp. 
xmlhttp.open("GET",url,true) 
xmlhttp.send(null) 
} 
//ie 
else if (window.ActiveXObject) // code for IE 
{ 
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP") 
    if (xmlhttp) 
    { 
    xmlhttp. 
    xmlhttp.open("GET",url,true) 
    xmlhttp.send() 
    } 
} 
} 
firefox中使用responseXML返回的值，不支持selectNodes,selectSingleNode方法，只能使用getElementsByTagName方法。