//------------------------------
// Rollover
//------------------------------
$(function(){
	$(".rollover").each(function(){
		var $a = $(this);
		var $i = $a.children("> img");
		if ( !$i.length ) return;
		//Pre loading
		var src = $i.attr("src");
		var o = src.split(".");
		var ext = o.pop();
		o[o.length-1] = o[o.length-1]+"-over."+ext;
		var over = o.join(".");
		var img = new Image();
		img.src = over;
		//Mouse Event
		$.data(this,"img",$i[0]);
		$.data(this,"src",src);
		$.data(this,"over",over);
		$a.hover(
			function () { $.data(this,"img").src = $.data(this,"over");},
			function () { $.data(this,"img").src = $.data(this,"src");}
		);
	});
});