(function($) {

	$(function() {
		$.js.Rollover();
	});

	//---------------------------------------------------------------------

	$.js = {
		
		//ロールオーバー
		Rollover: function(){
			 var preLoad = new Object();
			 $('.rollover img,img.rollover,input.rollover').not("[src*='_on.']").each(function(){
				  var imgSrc = this.src;
				  var fType = imgSrc.substring(imgSrc.lastIndexOf('.'));
				  var imgName = imgSrc.substr(0, imgSrc.lastIndexOf('.'));
				  var imgOver = imgName + '_on' + fType;
				  preLoad[this.src] = new Image();
				  preLoad[this.src].src = imgOver;
				  $(this).hover(
						function (){ this.src = imgOver; },
						function (){ this.src = imgSrc; }
				  );
			 });
		}
	};
})(jQuery);