function preload_images(imgs) {
	
    var img;
    for (var i = 0, len = imgs.length; i < len; ++i) {
        img = new Image();
        img.src = imgs[i];
    }
}

function $($div){
		return document.getElementById($div);
}

function goOfrecimiento($sigla, $img, $w, $h){
		window.open ("popUp_recintos.php?s=" + $sigla + "&img=" + $img, $sigla,"scrollbars=1,resizable=0,width="+($w+20)+",height=" + 500);
}

function startSlideShow($img_num){
	Lightbox.start($($img_num));
}