// JavaScript Document 
var aryImages = new Array(2); 
aryImages[0] = "images/poster-main.jpg"; 
aryImages[1] = "images/poster2.jpg"; 
aryImages[2] = "images/poster3.jpg"; 
aryImages[3] = "images/poster4.jpg"; 
aryImages[4] = "images/poster5.jpg"; 
aryImages[5] = "images/poster6.jpg"; 
aryImages[6] = "images/poster7.jpg"; 
aryImages[7] = "images/poster8.jpg"; 
aryImages[8] = "images/poster1.jpg"; 

for (i=0; i < aryImages.length; i++) { 
var preload = new Image(); 
preload.src = aryImages[i]; 
} 
function swap(imgIndex) { 
document['imgMain'].src = aryImages[imgIndex]; 
}