var http = false;

        if (navigator.appName == "Microsoft Internet Explorer") {
          http = new ActiveXObject("Microsoft.XMLHTTP");
        } 
        else {
          http = new XMLHttpRequest();
          
          if (http==null)
            alert("no XMLHttpRequest() support");
        } 



        function AjaxCall(url)
        {
          document.getElementById("progrss").style.display = "block";
	        //alert(url);
	        //throw "simon error";
	        //URL = "sajax.asp?ajax=" + id;
	        http.open("GET", url, true);
        	
	        http.onreadystatechange=onHttpReturn; 
        	
	        http.send(null);
        }

        function onHttpReturn()
        {
        	//alert(http.readyState);
	        if(http.readyState == 4) {
		        if(http.status == 200) {
			        docXML = http.responseText;
			        //alert(docXML);
			        getDisp().innerHTML = docXML;
			        AdjustCover();
			        document.getElementById("progrss").style.display = "none";
		        }
	        }
        }

        function showProgress(yes)
        {
            if (yes == true)
                document.getElementById("progrss").style.display = "block";
            else
                document.getElementById("progrss").style.display = "none";
        }
        
        function AjaxPost(url, data)
        {
        		//alert("loading " + url + ", " + data);
            document.getElementById("progrss").style.display = "block";
            http.open("POST", url, true);
            http.onreadystatechange = onHttpReturn;
            var header;
            header = 'Content-Type:application/x-www-form-urlencoded; charset=UTF-8';
            http.setRequestHeader(header.split(':')[0], header.split(':')[1]);
            //alert(data);
            http.send(data);
        }
        
        function getDisp()
        {
            return document.getElementById("listings");
        }
        
        function showLocation(obj)
        {
            alert("window's location: x=" + obj.offsetLeft + "; y=" + obj.offsetTop);
            alert("height=" + obj.offsetHeight + "; width=" + obj.offsetWidth);
            alert("style width=" + obj.style.width + "; style height=" + obj.style.height);
        }
        
        function show()
        {   
            showLocation(getDisp());
        }
        
        function hideSearchBox()
        {
            //alert("rlookup: " + document.getElementById("rlookup").style.display);
            document.getElementById("rlookup").style.display = "none";
            document.getElementById("cover").style.zIndex = -70;
        }
        
        function showSearchBox()
        {
            /*alert("showbox");
            if (document.getElementById("rlookup"))
                alert("found");
            else
                alert("not found");
            */
            document.getElementById("rlookup").style.display = "block";
            document.getElementById("cover").style.zIndex = 70;
        }
        
        function isZipCode(value) {
					  var RegExp = /^\d{5}$/;
					  return (RegExp.test(value));
				}

        function onZipSearch()
        {
            //show();
            if (isZipCode(document.getElementById("zip").value))
            {
	            AjaxPost("GetRest.asp?pgn=gcp", "PageSize=5&zip=" + document.getElementById("zip").value);
	            //show(); 
	            //alert(document.getElementById("zip").value);
	            hideSearchBox();
	          }
	          else
	          	alert("Please enter a 5-digit zip code.");
        }
        
        function onStateSearch()
        {   
        		//alert("OK again");
            //AjaxCall("GetState.asp?");
            if (document.getElementById("StateID").value == "")
            	alert("Please select a state.");
            else {
	            var url;
	            url = "GetState.asp?pgn=gcp";
	            var data;
	            //alert(document.getElementById("StateID").selectedIndex);
	            
	            data = "VicinitySearchLevel=state&StateID=" + document.getElementById("StateID").value;
	            //alert(url + "----" + data);
	            AjaxPost(url, data);
	            hideSearchBox();
	          }
        }
        
        function AdjustCover()
        {
            //document.getElementById("cover").style.height = document.getElementById("gc-box-right").clientHeight;
            //alert(document.getElementById("gc-box-right").clientHeight);
            //alert(document.getElementById("gc-box-right").getAttribute('height'));
        }