谁帮忙把这3个方法放到一起

Question

var xmlHttp;
var GetResult;
    function createXMLHttpRequest()
    {
        if(window.ActiveXObject)
        {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else if(window.XMLHttpRequest)
        {
            xmlHttp = new XMLHttpRequest();
        }
    }    function showResult()
    {
        if(xmlHttp.readyState==4)
        {
            if(xmlHttp.status==200)
            {
                GetResult=xmlHttp.responseText;    //假设这边返回123
                return GetResult;
            }
        }
    }    function XmlHttpSend(inurl) 
    {        
        var url=inurl;
        createXMLHttpRequest();
        xmlHttp.onreadystatechange = showResult;
        xmlHttp.open("GET",url,true);
        xmlHttp.send(null);
    }
    function GetReturn(URL)
    {
      createXMLHttpRequest();
      return GetResult;
    }

Answer 1

var xmlHttp;
    function createXMLHttpRequest()
    {
        if(window.ActiveXObject)
        {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else if(window.XMLHttpRequest)
        {
            xmlHttp = new XMLHttpRequest();
        }
    }
    function GetReturn(URL) 
    {        
        var url=URL;
        createXMLHttpRequest();
        xmlHttp.onreadystatechange =function(){
          if(xmlHttp.readyState==4){
               if(xmlHttp.status==200){
                 var GetResult=xmlHttp.responseText;    //假设这边返回123
                return GetResult;
               }
            }
         }
        xmlHttp.open("GET",url,true);
        xmlHttp.send(null);
    }

Answer 2

createXMLHttpRequest和function XmlHttpSend可以合并
showResult()回发处理函数一般是单独的，毕竟请求到了才执行，
不是立马就执行的，所以放一起不合适。
var xmlHttp;
    function createXMLHttpRequest()
    {
        if(window.ActiveXObject)
        {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else if(window.XMLHttpRequest)
        {
            xmlHttp = new XMLHttpRequest();
        }
        var url="aaa.ashx";
        createXMLHttpRequest();
        xmlHttp.onreadystatechange = showResult;
        xmlHttp.open("GET",url,true);
        xmlHttp.send(null);
    }    function showResult()
    {
        if(xmlHttp.readyState==4)
        {
            if(xmlHttp.status==200)
            {
                var GetResult=xmlHttp.responseText;    //假设这边返回123
                return GetResult;
            }
        }
    }

Answer 3

 function GetReturn(URL) {    
        var xmlHttp; 
        if(window.ActiveXObject){ 
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } 
        else if(window.XMLHttpRequest){ 
            xmlHttp = new XMLHttpRequest(); }         var url=URL; 
        createXMLHttpRequest(); 
        xmlHttp.onreadystatechange =function(){ 
          if(xmlHttp.readyState==4){ 
              if(xmlHttp.status==200){ 
                var GetResult=xmlHttp.responseText;    //假设这边返回123 
                return GetResult; 
              } 
            } 
        } 
        xmlHttp.open("GET",url,true); 
        xmlHttp.send(null); 
    }