if(document.images){  
// red nav OFF state
hn_buy_off = new Image(154, 38); hn_buy_off.src = "images/hn_buy.jpg";   
hn_see_off = new Image(142, 38); hn_see_off.src = "images/hn_see.jpg";   
hn_about_off = new Image(148, 38); hn_about_off.src = "images/hn_about.jpg";   
// red nav ON state
hn_buy_on = new Image(154, 38); hn_buy_on.src = "images/hn_buy_o.jpg";   
hn_see_on = new Image(142, 38); hn_see_on.src = "images/hn_see_o.jpg";   
hn_about_on = new Image(148, 38); hn_about_on.src = "images/hn_about_o.jpg";   
}
function imgOn(imgName) {
        if (document.images) {
		document[imgName].src = eval(imgName + "_on.src");
        }
}
function imgOff(imgName) {
        if (document.images) {
		document[imgName].src = eval(imgName + "_off.src");
        }
}