var pic0 = new Image() ;pic0.src = 'images/jpg/330/20_04_330.jpg';
var pic1 = new Image() ; 
var pic2 = new Image() ; 
var pic3 = new Image() ; 
function swapImage(imagevar) { 
switch(imagevar){ 
case "pic1": 
pic1.src = 'images/jpg/330/20_04_330.jpg'; 
break; 
case "pic2": 
pic2.src = 'images/jpg/330/20_05_330.jpg'; 
break; 
case "pic3": 
pic3.src = 'images/jpg/330/20_06_330.jpg'; 
break; 
} 
document['G1'].src = window[imagevar].src; 
}