/**
 * @author lwd
 */
var req;  				
        function callbacktime()
        {
            if(req.readyState == 4)
            {
                if(req.status == 200)
                {
                    parseMessagetime();
                }else{
                    alert("Not able to retrieve description"+req.statusText);
                }
            }
        }
 function parseMessagetime()
        {
            var xmlDoc=req.responseXML.documentElement;
            var xSel=xmlDoc.getElementsByTagName('select');
            var select_root=document.getElementById('timeid');//???????
            select_root.options.length=0;
            for(var i=0;i<xSel.length;i++)
            {
                var xValue=xSel[i].childNodes[0].firstChild.nodeValue;
                var xText=xSel[i].childNodes[1].firstChild.nodeValue;
				var option=new Option(xText,xValue);
                try{
//                    select_root.add(option);
                	select_root.options[i]=new Option(xText,xValue);
                }catch(e){
                }
            }
        }