function showloading(){

	var overlay = $('<div id="loading_overlay" style="position: fixed; z-index:100; top: 0px; left: 0px; height:100%; width:100%; background: #000;"></div>');
	
	$('body').append(overlay);
	overlay.css("opacity", 0.8);
	overlay.fadeIn(150);

	$('#loading_div').fadeIn();	
}


$(document).ready(function() {
	var loading = $('<div id="loading_div" style="display:none;position:fixed;top:50%;left:38%;width:24%; padding:10px; border:solid 1px #ccc; text-align:center;font-size:12px; z-index:102; background: #fff;"><b>Cargando...</b><br/><img src="/images/ajax-loader.gif"/></div>');
	$('body').append(loading);
});