/*function addEventHandler( selector, speed, opacityOut, opacityOver ) {
	$(selector).fadeTo( speed, opacityOut );
	
	$(selector).mouseover( function(event){
		$(this).fadeTo( speed, opacityOver );
	});
	
	$(selector).mouseout( function(event){
		$(this).fadeTo( speed, opacityOut );
	});	
}

$(document).ready(function(){
	var selector = "a img";
	var speed = 300;
	var opacityOut = 1;
	var opacityOver = 0.7;
	addEventHandler( selector, speed, opacityOut, opacityOver );	
});*/




$(function(){
	$('.roll').each(function(){							 
		this.originalSrc = $(this).attr('src');
		this.rolloverSrc = this.originalSrc.replace(/(\.gif|\.jpg|\.png)$/, '_on' + "$1");
		this.rolloverImg = new Image();
		this.rolloverImg.src = this.rolloverSrc;
	}).hover(function(){
		$(this).attr('src', this.rolloverSrc);			
	},function(){
		$(this).attr('src', this.originalSrc);	
	});
});