var isIE5Mac = ((navigator.userAgent.indexOf("MSIE 5.") != -1) && 
        (navigator.userAgent.indexOf("Mac") != -1) && 
        (navigator.userAgent.indexOf("Opera") == -1));

var oldImgSrc = [];

function imgLoad(srcName) {
    (new Image()).src = srcName;
    (new Image()).src = imgOverSrc(srcName);
}

function imgOverSrc(srcName) {
    var ext = srcName.lastIndexOf(".");
    return srcName.substring(0, ext) +
    		"-over" + srcName.substring(ext, srcName.length);
}

function imgOvr(imgName) {
    var img = document.images[imgName];
    //if (img.rollOff) return;
    oldImgSrc[imgName] = img.src;
    img.src = imgOverSrc(img.src);
}

function imgOut(imgName) {
    var img = document.images[imgName];
    //if (img.rollOff) return;
    img.src = oldImgSrc[imgName];
}

function imgRollOff(img) {
    img.rollOff = true;
}

function imgRollOn(img) {
    img.rollOff = false;
}

var curr = "start";

function setCurrent(id) {
    document.getElementById(curr).style.display = "none";
    document.getElementById(curr + "Link").className = "";
    document.getElementById(id).style.display = "";
    document.getElementById(id + "Link").className = "current";
    curr = id;
}

function popUpWin(url, width, height, scrolls) {
	//var name = null;
	//if (!isIE5Mac) {
	var    name = "pop" + width + "x" + height + (scrolls ? "s" : "");
	//}
    var newWin = window.open(url, name, "width=" + width + ",height=" + height +
            ",toolbar=no,location=no,directories=no,status=no,menubar=no" +
            ",scrollbars=" + (scrolls ? "yes" : "no") + ",resizable=yes");
    newWin.focus();
}

function popUpImg(src, width, height) {
    popUpWin("popImg.asp?src=" + src, width, height, false);
}

imgLoad("pix/nav_kay.gif");
imgLoad("pix/nav_gear.gif");
imgLoad("pix/nav_sup.gif");
imgLoad("pix/nav_abt.gif");
imgLoad("pix/nav_deal.gif");
imgLoad("pix/buy.gif");