function $( id ) {
	var obj = null;
	
	if( document.getElementById ) {
		obj = document.getElementById( id );
	}
	else if( document.all ) {
		obj = document.all[id];
	}
	else {
		obj = document.layer[id];
	}
	
	return obj;
}

// utils function load Ajax
function sendRequest( sLink, layer, disable ) {
	if( typeof(disable) == 'undefined' )
		disable = true;
	
	if( disable == true )
		disableBody( true );
	
	AjaxRequest.get(
		{
			'url': sLink,
			'onSuccess': function(req) {
				if( req.responseText ) {
					$(layer).innerHTML = req.responseText;
				}
				if( disable == true )
					disableBody( false );
			},
			'onError': function(req) {
				if( disable == true )
					disableBody( false );
			}
		}
	);
}

// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize() {
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

function disableBody( status ) {
	if( typeof(status) == 'undefined' ) {
		status = true;
	}
	
	if( !$('lulo_overlay') ) {
		var objBody = document.getElementsByTagName("body").item(0);
		
		var objOverlay = document.createElement("div");
		objOverlay.id = 'lulo_overlay';
		objOverlay.className = 'overlay';
		objOverlay.style.display = 'none';
		objBody.appendChild(objOverlay);
	}
	
	var objOverlay = $('lulo_overlay');
	
	if( status == true ) {
		var arrayPageSize = getPageSize();
		
		objOverlay.style.width = arrayPageSize[0] +'px';
		objOverlay.style.height = arrayPageSize[1] +'px';
		
		objOverlay.style.display = 'block';
	}
	else {
		objOverlay.style.display = 'none';
		
		objOverlay.style.width = '0px';
		objOverlay.style.height = '0px';
	}
}