Browser = false ;
if (((navigator.appName.charAt(0)=="N") && (navigator.appVersion.charAt(0)>=3)) || 
((navigator.appName.charAt(0)=="M") && (navigator.appVersion.charAt(0)>=4))) {
    Browser = true;
    


launch_ox_off = new Image();
launch_ox_off.src = "images/launch_ox_off.png";
launch_ox_over = new Image();
launch_ox_over.src = "images/launch_ox_over.png";

box_mail_off = new Image();
box_mail_off.src = "images/box_mail_off.png";
box_mail_over = new Image();
box_mail_over.src = "images/box_mail_over.png";

launch_gall_off = new Image();
launch_gall_off.src = "images/launch_gall_off.png";
launch_gall_over = new Image();
launch_gall_over.src = "images/launch_gall_over.png";

official_off = new Image();
official_off.src = "images/official_off.png";
official_over = new Image();
official_over.src = "images/official_over.png";

gallery_off = new Image();
gallery_off.src = "images/gallery_off.png";
gallery_over = new Image();
gallery_over.src = "images/gallery_over.png";

shop_off = new Image();
shop_off.src = "images/shop_off.png";
shop_over = new Image();
shop_over.src = "images/shop_over.gif";

mail_off = new Image();
mail_off.src = "images/mail_off.png";
mail_over = new Image();
mail_over.src = "images/mail_over.gif";
   
    }    

function rollover(place, imgName) {
    if (Browser == true) {
        document[place].src =eval(imgName + ".src");
    }
}

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

function doPic(imgName, imgWidth, imgHeight) {
    if (ns3up || ie4up) {
        imgOn = ("" + imgName);
        imgWidthInt = parseInt(imgWidth);
        imgHeightInt = parseInt(imgHeight);
        parent.mainpic.src = imgOn;
        parent.mainpic.width = imgWidthInt;
        parent.mainpic.height = imgHeightInt;
    }
}