//this script is for the navigation

browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion)
>= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") &&
(parseInt(navigator.appVersion) >= 4 )))
        if ( browser) {
                normal = new MakeArray(4)
                roll = new MakeArray(4)

                normal[1].src = "images/btn_existing_off.jpg"
                normal[2].src = "images/btn_new_off.jpg" 
                normal[3].src = "images/btn_program_off.jpg" 
                normal[4].src = "images/btn_shade_off.jpg" 

                roll[1].src = "images/btn_existing_on.jpg"
                roll[2].src = "images/btn_new_on.jpg" 
                roll[3].src = "images/btn_program_on.jpg" 
                roll[4].src = "images/btn_shade_on.jpg" 
                                }
function MakeArray(n) {
      this.length = n
      for (var i = 1; i<=n; i++) {
       this[i] = new Image()

                      }
                return this
}

function msover(num) {
if ( browser) { 
loadImage = "Image" + num;
document.images[loadImage].src = roll[num].src
}

                }

function msout(num) {
if ( browser) {
loadImage = "Image" + num;
document.images[loadImage].src = normal[num].src
}
}

// -->