function preloadImages(imgs){
	
	var picArr = [];
	
		for (i = 0; i<imgs.length; i++){
			
				picArr[i]= new Image(100,100); 
				picArr[i].src=imgs[i]; 

			
			}
	
	}
	
	preloadImages([
		'images/facebook-act.png', 
		'images/rss-act.png',
		'images/link1-right-act.gif',
		'images/link1-left-act.gif',
		'images/link1-tail-act.gif',
		'images/extra-logo1-act.png',
		'images/extra-logo2-act.png',
		'images/extra-logo3-act.png',
		'images/extra-logo4-act.png']);