// "constants"



//browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))



nav1 = new Image();

nav1.src = "images/nav1.gif";

nav1_on = new Image();

nav1_on.src = "images/nav1_on.gif";



nav2 = new Image();

nav2.src = "nav2.gif";

nav2_on = new Image();

nav2_on.src = "nav2_on.gif";



nav3 = new Image();

nav3.src = "nav3.gif";

nav3_on = new Image();

nav3_on.src = "nav3_on.gif";



nav4 = new Image();

nav4.src = "nav4.gif";

nav4_on = new Image();

nav4_on.src = "nav4_on.gif";



nav5 = new Image();

nav5.src = "nav5.gif";

nav5_on = new Image();

nav5_on.src = "nav5_on.gif";



nav6 = new Image();

nav6.src = "nav6.gif";

nav6_on = new Image();

nav6_on.src = "nav6_on.gif";



nav7 = new Image();

nav7.src = "nav7.gif";

nav7_on = new Image();

nav7_on.src = "nav7_on.gif";



nav8 = new Image();

nav8.src = "nav8.gif";

nav8_on = new Image();

nav8_on.src = "nav8_on.gif";



function addbutton(imgname) {

        eval(imgname + ' = new Image()');

        eval(imgname + '.src = "images/" + imgname + ".gif"');

        eval(imgname + '_on = new Image()');

        eval(imgname + '_on.src = "images/" + imgname + "_on.gif"');

}



// event handler functions

function msover(imgname) {

        if (document.images) document.images[imgname].src = eval(imgname + '_on.src');

}

function msout(imgname) {

        if (document.images) document.images[imgname].src = eval(imgname + '.src');

}