function rollMe(whichOne) {
	if(whichOne == "home") document.getElementById('home').style.backgroundPosition= "0px -30px";
	if(whichOne == "about") document.getElementById('about').style.backgroundPosition= "0px -30px";	
	if(whichOne == "global") document.getElementById('global').style.backgroundPosition= "0px -30px";	
	if(whichOne == "listing") document.getElementById('listing').style.backgroundPosition= "0px -30px";
	if(whichOne == "choose_us") document.getElementById('choose_us').style.backgroundPosition= "0px -30px";	
	if(whichOne == "contact") document.getElementById('contact').style.backgroundPosition= "0px -30px";	
	if(whichOne == "client") document.getElementById('client').style.backgroundPosition= "0px -30px";
	if(whichOne == "download") document.getElementById('download').style.backgroundPosition= "0px -30px";
	
}

function rolloff(whichOne) {
	if(whichOne != "home") document.getElementById('home').style.backgroundPosition= "0px 0px";
	if(whichOne != "about") document.getElementById('about').style.backgroundPosition= "0px 0px";	
	if(whichOne != "global") document.getElementById('global').style.backgroundPosition= "0px 0px";	
	if(whichOne != "listing") document.getElementById('listing').style.backgroundPosition= "0px 0px";
	if(whichOne != "choose_us") document.getElementById('choose_us').style.backgroundPosition= "0px 0px";	
	if(whichOne != "contact") document.getElementById('contact').style.backgroundPosition= "0px 0px";
	if(whichOne != "client") document.getElementById('client').style.backgroundPosition= "0px 0px";
	if(whichOne != "download") document.getElementById('download').style.backgroundPosition= "0px 0px";
}