function getXMLHttpRequest() {
        var xmlhttprequest = null;
        if(window.XMLHttpRequest) {
            xmlhttprequest = new XMLHttpRequest();
        }else if(window.ActiveXObject) {
            xmlhttprequest=new ActiveXObject("Microsoft.XMLHTTP");
        }
        return xmlhttprequest;
   }
       initSys();
        function initSys() {
            var xmlhttp = getXMLHttpRequest();
            if(xmlhttp != null) {
               var url = "view.do?action=checkUrl&radom="+Math.random();
               xmlhttp.onreadystatechange=function(){
                if(xmlhttp.readyState==4)
                        {
                            if(xmlhttp.responseText != '' && xmlhttp.responseText != null) {
                            var product_url = xmlhttp.responseText;
                            document.getElementById("producturl").innerHTML = "<h3>"+xmlhttp.responseText+"</h3>";
                            }
                        }
              }
              xmlhttp.open("GET",url,true);
                xmlhttp.send(null);
            }
       }