$(function(){
	
	$('a.rollover').each(function(){
		var target = $(this);
		var img = target.find('img');
		var selector = 'on';
		$(img).each(function(){
			var target02 = $(this);
			var rollimg  = target02.attr('src');
			var filename = rollimg.substr(rollimg.lastIndexOf('.'));
			var path = {
				off : rollimg,
				on	: rollimg.substr(0, rollimg.lastIndexOf('.')) + selector + filename
			};


			// preload
			var preImg = new Image();
			preImg.src = path.on;
			target.mouseover(function(){
				target02.attr('src',path.on);
			}).mouseout(function(){
				target02.attr('src',path.off);
			});
		
		});
		
	});
	
})