var request = null;

/*
reqType  = GET, POST, ...
url = serverside url
asynch = boolean
*/
function httpRequest(reqType,url,async,respHandle) {

	if (window.XMLHttpRequest){
		request = new XMLHttpRequest();
	}else if( window.ActiveXObject){
		request = new ActiveXObject("Msxml2.XMLHTTP");
		if (!request){
			request = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	
	if (request){
		if (reqType.toLowerCase() != "post" ){
			initReq(reqType,url,async,respHandle);
		}else{
			var args = arguments[4];
			if(args != null && args.lenght > 0){
				initReq(reqType,url,async,respHandle,args);
			}
		}
	}else{
		alert ("You browser dont support AJAX features! ");
	}
	return request;
}


function initReq(reqType,url,bool,respHandle) {
	try{
		request.onreadystatechange = respHandle;
		request.open(reqType,url,bool);
		if(reqType.toLowerCase() == "post"){
			request.setRequestHeader("Content-type","application/x-www-form-urlencoded; charset=UTF-8");
			request.send(arguments[4]);
		}else{
			request.send(null);
		}
		
	}catch(errv){
		alert("error contacting the server : " + errv.message);
		
	}
	
}