//preload images for rollover effect
if (document.images) {

loginOn = new Image;
loginOn.src = "images/login_on.gif";
loginOff = new Image;
loginOff.src = "images/login_off.gif";

newuserOn = new Image;
newuserOn.src = "images/newuser_on.gif";
newuserOff = new Image;
newuserOff.src =  "images/newuser_off.gif";

staffOn = new Image;
staffOn.src = "images/staffon.gif";
staffOff = new Image;
staffOff.src = "images/staffoff.gif";

bodOn = new Image;
bodOn.src = "images/bodon.gif";
bodOff = new Image;
bodOff.src =  "images/bodoff.gif";

}

//image swapping for rollover effect
function swapImage(imageName,imageFile) { 
if (document.images) {eval('document.images[imageName].src='+imageFile+'.src');}
else return;
}