function createXMLHTTP(){
  				var arrSignatures = ["MSXML2.XMLHTTP.5.0","MSXML2.XMLHTTP.4.0",
  							"MSXML2.XMLHTTP.3.0","MSXML2.XMLHTTP","MSXML.XMLHTTP"];
		    if(window.XMLHttpRequest)
		    {
		        var oRequest =new XMLHttpRequest();
		        return oRequest;
		    }
		  	
  			for(var i=0; i < arrSignatures.length; i++){
  			
  				try{
	  				var oRequest = new ActiveXObject(arrSignatures[i]);
	  				
					return oRequest;
  				}catch(oError){
					if(i==(arrSignatures.length-1))
	  					alert(oError);
  				}
  			
  			}
  		
  		}
	
	//set select 
	 function setSelect(selectId,requestUrl){			
		var  xmlHttpR = createXMLHTTP(); 
	    xmlHttpR.open("GET",requestUrl,true);  
	    xmlHttpR.onreadystatechange = function(){
	      if(xmlHttpR.readyState==4) {
                if(xmlHttpR.status==200) {
                	var ids =  xmlHttpR.responseXML.getElementsByTagName('id');
			        var names =  xmlHttpR.responseXML.getElementsByTagName('name');	
			        var titles =  new Array();
			        if(xmlHttpR.responseXML.getElementsByTagName('title')){
			        	titles = xmlHttpR.responseXML.getElementsByTagName('title');
			        }
			        	
			       	var title = '不限';
			        if(titles){
			        	title = titles[0].firstChild.data;
			        }
					var selectObj = document.getElementById(selectId);							
					selectObj.length = 0;		
					selectObj.options[0] = new Option(title,''); 
					for(var i=1;i<ids.length+1;i++){
						selectObj.options[i] = new Option(names[i-1].firstChild.data,ids[i-1].firstChild.data);                   
                  }
             }
	    
			}		
	    }
        xmlHttpR.send(null);
       
	}