function preloadImages(images) {
    $(images).each(function(){
    	var image=new Image();
    	image.src = 'images/'+this;
    	//alert(image.src);
    });
}

function initRollovers(ids){
	for (var i in ids){
		$('li#'+ids[i]+'>a').hover(
			function(){
				$(this).css('background-image', $(this).css('background-image').replace(/.png/, '_f2.png'));	
			},
			function(){
				$(this).css('background-image', $(this).css('background-image').replace(/_f2.png/, '.png'));	
			}
		);
	}
}

$(document).ready(function() {
	initRollovers(['appsmyths','GDPortfolio','cv','blog']);
	preloadImages(['appsmyths_f2.png','graphic_design_portfolio_f2.png', 'cv_f2.png', 'blog_f2.png']);
});