// JavaScript Document
function changeDivImage() 
{ 
    document.getElementById("main").style.backgroundImage = "url(images/template_15.jpg)"; 
} 
function changeDivImageTwo()
{ 
    document.getElementById("main").style.backgroundImage = "url(images/symantec_13.gif)"; 
} 
function changeDivImageThree()
{ 
    document.getElementById("main").style.backgroundImage = "url(images/template_15.jpg)"; 
}