$(function(btn1) {
    $('.rollover').hover(function() {
        var currentImg = $(this).attr('src');
       $(this).attr('src', $(this).attr('hover'));
        $(this).attr('hover', currentImg);
    }, function() {
        var currentImg = $(this).attr('src');
        $(this).attr('src', $(this).attr('hover'));
        $(this).attr('hover', currentImg);
    });
});

function rollBtn(btnName) {
	$('.' + btnName + '-on').fadeIn('slow');
	$('.' + btnName + '-off').fadeOut('slow');
	$('.' + btnName + '-on').fadeOut('slow');
	$('.' + btnName + '-off').fadeIn('slow');
}

function rollSprite(btnName, intTime) {
	if( !intTime ) {
		intTime = 500;
	}
	
	$('.' + btnName).addClass(btnName + '-hover');
	$.doAfter(intTime, function() {
		$('.' + btnName).removeClass(btnName + '-hover');
	});
}

$(document).ready(function() {
	$.preloadImages('/images/btn1over.jpg', '/images/btn2over.jpg', '/images/btn3over.jpg','/images/btn1over1.jpg', '/images/btn2over1.jpg', '/images/btn3over1.jpg')
});

(function($){
    jQuery.doAfter = function(time,f){
        $('body').animate({opacity:1},time,f);
    };
	jQuery.preloadImages = function() {
	  for(var i = 0; i<arguments.length; i++) {
		jQuery("<img>").attr("src", arguments[i]);
	  }
	}
})(jQuery);