function layer(url) {
		$(".contenidor").before('<div class="fonsLayer"><div>&nbsp;</div></div><div class="contLayer"></div>');
		$(window).bind("resize scroll", ampliarResizeLayer);
		ampliarResizeLayer();
		$(".fonsLayer").fadeIn("slow");
		$(".contLayer").load(url);
}
function ampliarResizeLayer() {
		var iebody=(document.compatMode && document.compatMode != "BackCompat")? document.documentElement : document.body;
		var dsocleft=document.all? iebody.scrollLeft : pageXOffset;
		var dsoctop=document.all? iebody.scrollTop : pageYOffset;

		$(".fonsLayer").css("width", $("body").width());
		$(".fonsLayer").css("height", $(document).height());

		$(".contLayer").css("left", dsocleft + (Math.floor($(window).width()-764)/2) );
		$(".contLayer").css("top", dsoctop + (Math.floor($(window).height()-470)/2) );	
}
function cerrarLayer() {
		$(window).unbind("resize scroll", ampliarResizeLayer);

		$(".contLayer").remove();
		$(".fonsLayer").fadeOut("slow", callbackLayer);
}
function callbackLayer() {
		$(".fonsLayer").remove();
}