contactuson = new Image();
contactuson.src = "img/contactus_roll.jpg";
contactusoff = new Image();
contactusoff.src = "img/contactus.jpg";

whyuseon = new Image();
whyuseon.src = "img/whyuse_roll.jpg";
whyuseoff = new Image();
whyuseoff.src = "img/whyuse.jpg";

historyon = new Image();
historyon.src = "img/history_roll.jpg";
historyoff = new Image();
historyoff.src = "img/history.jpg";

clientson = new Image();
clientson.src = "img/clients_roll.jpg";
clientsoff = new Image();
clientsoff.src = "img/clients.jpg";

awardson = new Image();
awardson.src = "img/awards_roll.jpg";
awardsoff = new Image();
awardsoff.src = "img/awards.jpg";

newson = new Image();
newson.src = "img/news_roll.jpg";
newsoff = new Image();
newsoff.src = "img/news.jpg";

function imgOn(imgName) 
{        
    if (document.images) 
    {
        document.images[imgName].src = eval(imgName + "on.src");
	}
}

function imgOff(imgName) 
{
    if (document.images) 
    {
        document.images[imgName].src = eval(imgName + "off.src");
	}
}