var app_url = "";

var http_request = null;

//the first program to run
function init(){
	mapDiv = document.getElementById("map");
	loadMap(mapDiv);

}


//creates HTTP Request
function createRequest(){
     var req;
	 try{
            if (window.XMLHttpRequest) {
                    req = new XMLHttpRequest();
            } else if (window.ActiveXObject) {
                 try {
                        req = new ActiveXObject("Msxml2.XMLHTTP");
                 } catch (e) {
                        try {
                            req = new ActiveXObject("Microsoft.XMLHTTP");
                        } catch (e) {}
                }
            }
        }catch(e) { 
        }
        return req;
}

//generates a GET Request
function do_GET(url, responseHandler){
	http_request = createRequest();
	http_request.onreadystatechange = responseHandler;
	//alert("do_GET url ==>" + url);
	http_request.open("GET", url, true);
    http_request.send("null");
}

//generates POST Request
function do_POST(params, url, responseHandler){
		http_request = createRequest();
		http_request.onreadystatechange = responseHandler;
        http_request.open('POST', url, true);
        http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      	http_request.setRequestHeader("Content-length", params.length);
        http_request.send(params);
}


function do_GET_SyncText(url){
	var rsp;
	http_request = createRequest();
//	http_request.onreadystatechange = responseHandler;
	http_request.open('GET', url, false);
    http_request.send(null);
    if(isResponseReady()){
    
	    if(http_request.status == 200){
				rsp = http_request.responseText;
		}
	}
	return rsp;
    
}
//is Response ready
function isResponseReady(){
	return http_request.readyState == 4;
}

//returns reponse as Text
function getResponseAsText(){
	var response ;
		if(http_request.status == 200){
			response = http_request.responseText;
		}
	return response;
}


//returns reponse as XML
function getResponseAsXML(){
	var response ;
		    if(http_request.status == 200 || http_request.status == 304 )
			{
			    response = http_request.responseXML;
			}	
	return response;
}

function runTimer(jsMethod){
  
	if(self.jsMethod ){
			jsMethod;
			return;	
	}
	inter = setInterval(jsMethod,900000000000);		
}

function clearTimer(){
	try{
		clearInterval(inter);
	}catch(exception){
		alert(exception);
	}
}

var inter = null;