function rollOff(which)    {
		document.images[which].src = "../../i/" + which + "_off.gif";    }	
function rollOver(which)    {
		document.images[which].src = "../../i/" + which + "_over.gif";    } 
function rollOn(which)    {
		document.images[which].src = "../../i/" + which + "_on.gif";    }	 


	about = new Image();
	about.src = "../../i/about_off.gif";
	
	news_and_events = new Image();
	news_and_events.src = "../../i/news_off.gif";
	
	investors = new Image();
	investors.src = "../../i/investors_off.gif";
	
	careers = new Image();
	careers.src = "../../i/careers_on.gif";
	careers.src = "../../i/careers_off.gif";
	
	about = new Image();
	about.src = "../../i/about_on.gif";
	
	news_and_events = new Image();
	news_and_events.src = "../../i/news_on.gif";
	
	investors = new Image();
	investors.src = "../../i/investors_on.gif";