function GC_Ajax(doOnAnswer) {

	var data='';
	this.init=createAjaxObject;
	this.sendQuery=sendAjaxQuery;
	this.doOnAnswer=doOnAnswer;
	this.addData=addData;
	this.getData=getData;
}

function addData(varName, value) {
	value=encodeURIComponent(value)
	value=value.replace(/\+/gi, '%2B')
	if(this.data)
		this.data+='&'+varName+'='+value;
	else
		this.data='&'+varName+'='+value;
}

function getData() {
	return this.data;
}

function createAjaxObject() {
	var ro;
	if(window.XMLHttpRequest) {
		ro = new XMLHttpRequest() ;
	}
	else {
		ro = new ActiveXObject("Microsoft.XMLHTTP");
	}

	this.handler=ro;
	return this.handler;
}


function sendAjaxQuery(action, data)
{
	if(!data)
		var data='';
	this.handler.open('POST', action, true);

	this.handler.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=utf-8');
	data=encodeURI(data)
	data=data.replace(/\+/gi, '%2B');
	
	this.handler.send(this.data+data+'&ajaxCall=true');
	
	this.handler.onreadystatechange = this.doOnAnswer;
}



function ajaxQuery(action, data, callback) {
	if(!data) {
		var data='';
	}
	var handler=new GC_Ajax(function(){
		if(h.readyState==4) {
			if(callback) {
				callback(h.responseText);
			}
		}
	});
	var h=handler.init();
	handler.sendQuery(action, data);
}




function ajaxSetContent(id, action, data, callback) {
	if(!data)
		var data='';

	if(!document.getElementById(id))
		return;
	var handler=new GC_Ajax(function() {
		if(h.readyState==4) {
			document.getElementById(id).innerHTML=h.responseText;
			if(callback)
				callback();
		}
	});
	var h=handler.init();
	handler.sendQuery(action, data);
}