// JavaScript Document
function get_random()
{
    
    var ranNum= Math.floor(Math.random()*4);
    return ranNum;
}

function getaQuote()
{ 
    
	 var page_bg = document.getElementById("page_bg");
     if (page_bg != null){
	 var whichQuote=get_random();
	 
	  
     var quote=new Array(4)
     quote[0]="url(images/banner1.jpg)";
     quote[1]="url(images/banner2.jpg)";
     quote[2]="url(images/banner3.jpg)";
     quote[3]="url(images/banner4.jpg)";
     
     page_bg.style.background= quote[whichQuote] +  " no-repeat top left";
     }
}