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/gallery_big_img1.jpg',
		'images/gallery_big_img2.jpg', 
		'images/gallery_big_img3.jpg', 
		'images/gallery_big_img4.jpg',
		'images/gallery2_big_img1.jpg',
		'images/gallery2_big_img2.jpg', 
		'images/gallery2_big_img3.jpg', 
		'images/gallery2_big_img4.jpg',
		'images/gallery3_big_img1.jpg',
		'images/gallery3_big_img2.jpg', 
		'images/gallery3_big_img3.jpg', 
		'images/gallery3_big_img4.jpg']);