if (document.images) {
sernav1 = new Image ();
sernav1.src = "blank.gif";
sernav2 = new Image ();
sernav2.src = "serline.gif";
sernav3 = new Image ();
sernav3.src = "serline.gif";
sernav4 = new Image ();
sernav4.src = "serline.gif";
sernav5 = new Image ();
sernav5.src = "blank.gif";
sernav6 = new Image ();
sernav6.src = "serline.gif";
sernav7 = new Image ();
sernav7.src = "serline.gif";


sernav1r = new Image ();
sernav1r.src = "serarrow.gif";
sernav2r = new Image ();
sernav2r.src = "serarrow.gif";
sernav3r = new Image ();
sernav3r.src = "serarrow.gif";
sernav4r = new Image ();
sernav4r.src = "serarrow.gif";
sernav5r = new Image ();
sernav5r.src = "serarrow.gif";
sernav6r = new Image ();
sernav6r.src = "serarrow.gif";
sernav7r = new Image ();
sernav7r.src = "serarrow.gif";

}

function serOn (imgName) {
	if (document.images) {
		document [imgName].src = eval (imgName + "r.src");
		}
}
function serOff (imgName) {
	if (document.images) {
		document [imgName].src = "blank.gif";
		document [imgName].src = eval (imgName + ".src");
	}
}