var preLoadmenu = new Array()


window.onload = function(){
    preLoadmenu[0] = new Image();
    preLoadmenu[0].src = "../images/btn_out.png";
	preLoadmenu[1] = new Image();
    preLoadmenu[1].src = "../images/btn_over.png";
	preLoadmenu[2] = new Image();
    preLoadmenu[2].src = "../images/btn_selected.png";
}


function selectMenu(obj){
	if(document.getElementById('menu_active') != null)	
		document.getElementById('menu_active').id = '';
	obj.id = 'menu_active';
}

function SetImage(sender, image)
{
	document.getElementById(sender).src = image;
}

function nuevoAjax(){
	var xmlhttp=false;
	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} 
	catch (e) {
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} 
		catch (E) {
			xmlhttp = false;
		}
	}
	
	if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}

function login(){
	c = document.getElementById('msg_error');
	user = document.getElementById('log').value;
	pass = document.getElementById('pwd').value;
	
	ajax=nuevoAjax();
	c.innerHTML = '<img src="images/loading-small.gif" />'; 
	ajax.open("POST", "login.php",true);
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {
			if(ajax.responseText != 0)
				c.innerHTML = ajax.responseText;
			else
				window.location.reload();
		}
		
	}
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	ajax.send("user="+user+"&pass="+pass);
	return false;
}

function logout(){
	ajax=nuevoAjax();
	ajax.open("POST", "logout.php",true);
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {
			window.location.reload();
		}
	}
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	ajax.send();
}

function loadpage(url, target){
	ajax=nuevoAjax();
	ajax.open("POST", url,true);
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {
			document.getElementById(target).innerHTML = ajax.responseText;
		}
	}
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	ajax.send();
	return false;
}