function showEvents(str){ 
                        var top_events=zXmlHttp.createRequest();
                        if (top_events==null)
                        {
                        alert ("Browser does not support HTTP Request");
                        return;
                        } 

                        var url = "";
                        if (str != "") url = "/Content/Event/" + str;
                       
	                    if (url =="") {
		                    document.getElementById("top_events_content").innerHTML = "" ;
	                    } else {
		                    top_events.open("GET",url,false);
		                    top_events.send(null);
		                    document.getElementById("top_events_content").innerHTML = top_events.responseText;
                        }
                    }