// ---  image mouseovers  -----------

// Detect browser 
function Is() {
    var agent = navigator.userAgent.toLowerCase();
    this.major = parseInt(navigator.appVersion);
    this.minor = parseFloat(navigator.appVersion);
    this.ns  = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
    this.ns2 = (this.ns && (this.major == 3));
    this.ns3 = (this.ns && (this.major == 3));
    this.ns4 = (this.ns && (this.major == 4));
    this.ns475 = (this.ns && (this.minor == 4.75));
    this.ns6 = (this.ns && (this.major >= 5)); 
    this.ie   = (agent.indexOf("msie") != -1);
    this.ie3  = (this.ie && (this.major == 2));
    this.ie4  = (this.ie && (this.major == 4));
    this.ie5  = (this.ie && (this.major >= 5));
    this.op3 = (agent.indexOf("opera") != -1);
}

var is = new Is();

// Create image objects, preload all active and inactive images.
    if(is.op3 || is.ie4 || is.ie5 || is.ns3 || is.ns4 || is.ns475 || is.ns6) {
    img1on = new Image();
      img1on.src = "nav/home-on.gif";
    img2on = new Image();
      img2on.src = "nav/vacations-on.gif";
    img3on = new Image();
      img3on.src = "nav/cruises-on.gif";
    img4on = new Image();
      img4on.src = "nav/hawaii-on.gif";
    img5on = new Image();
      img5on.src = "nav/alaska-on.gif";
    img6on = new Image();
      img6on.src = "nav/mexico-on.gif";
    img7on = new Image();
      img7on.src = "nav/hotdeals-on.gif";
    img8on = new Image();
      img8on.src = "nav/hotels-on.gif";
    img9on = new Image();
      img9on.src = "nav/tools-on.gif";
    img10on = new Image();
      img10on.src = "nav/contactus-on.gif";
    img11on = new Image();
      img11on.src = "nav/advertising-on.gif";
    img12on = new Image();
      img12on.src = "nav/legal-on.gif";
    img13on = new Image();
      img13on.src = "nav/sitemap-on.gif";
        
    img1off = new Image();
      img1off.src = "nav/home-off.gif";
    img2off = new Image();
      img2off.src = "nav/vacations-off.gif";
    img3off = new Image();
      img3off.src = "nav/cruises-off.gif";
    img4off = new Image();
      img4off.src = "nav/hawaii-off.gif";
    img5off = new Image();
      img5off.src = "nav/alaska-off.gif";
    img6off = new Image();
      img6off.src = "nav/mexico-off.gif";
    img7off = new Image();
      img7off.src = "nav/hotdeals-off.gif";
    img8off = new Image();
      img8off.src = "nav/hotels-off.gif";
    img9off = new Image();
      img9off.src = "nav/tools-off.gif";
    img10off = new Image();
      img10off.src = "nav/contactus-off.gif";
    img11off = new Image();
      img11off.src = "nav/advertising-off.gif";
    img12off = new Image();
      img12off.src = "nav/legal-off.gif";
    img13off = new Image();
      img13off.src = "nav/sitemap-off.gif";
        }

// Function to "activate" images.
function imgAct(imgName) {
    if(is.op3 || is.ie4 || is.ie5 || is.ns3 || is.ns4 || is.ns475 || is.ns6) {
    document[imgName].src = eval(imgName + "on.src");
    }
}

// Function to "deactivate" images.
function imgInact(imgName) {
    if(is.op3 || is.ie4 || is.ie5 || is.ns3 || is.ns4 || is.ns475 || is.ns6) {
    document[imgName].src = eval(imgName + "off.src");
    }
}

// -->