//detect browser:
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) browserVer = "1";
else if (browserName == "Microsoft Internet Explorer" && browserVer == 4) browserVer = "1";
else browserVer = "2";

//preload images:
if (browserVer == 1) {
overview_off = new Image(102,34);
overview_off.src = "/images/header-overview-off.png";
overview_on = new Image(102,34);
overview_on.src = "/images/header-overview-on.png";
contact_off = new Image(95,34);
contact_off.src = "/images/header-contact-off.png";
contact_on = new Image(95,34);
contact_on.src = "/images/header-contact-on.png";
features_off = new Image(102,34);
features_off.src = "/images/header-features-off.png";
features_on = new Image(102,34);
features_on.src = "/images/header-features-on.png";
pricing_off = new Image(92,34);
pricing_off.src = "/images/header-pricing-off.png";
pricing_on = new Image(92,34);
pricing_on.src = "/images/header-pricing-on.png";
screenshots_off = new Image(139,34);
screenshots_off.src = "/images/header-screenshots-off.png";
screenshots_on = new Image(139,34);
screenshots_on.src = "/images/header-screenshots-on.png";
testimonials_off = new Image(136,34);
testimonials_off.src = "/images/header-testimonials-off.png";
testimonials_on = new Image(136,34);
testimonials_on.src = "/images/header-testimonials-on.png";
}

//image swapping function:
function hiLite(imgDocID, imgObjName, comment) {
if (browserVer == 1) {
document.images[imgDocID].src = eval(imgObjName + ".src");
window.status = comment; return true;
}}