function swap(imageName,url) {
  var objImage = document.getElementById(imageName);
  objImage.src = url;
}

var showcaseImages = new Array();
    showcaseImages[0]  = new Image(480,230);
    showcaseImages[1]  = new Image(480,230);
    showcaseImages[2]  = new Image(480,230);
    showcaseImages[3]  = new Image(480,230);
    showcaseImages[4]  = new Image(480,230);
    showcaseImages[5]  = new Image(480,230);
    showcaseImages[6]  = new Image(480,230);
    showcaseImages[7]  = new Image(480,230);
    showcaseImages[8]  = new Image(480,230);
    showcaseImages[9]  = new Image(480,230);
    showcaseImages[10] = new Image(480,230);
    showcaseImages[11] = new Image(480,230);

    showcaseImages[0].src  = 'images/gallery/gal01.jpg';
    showcaseImages[1].src  = 'images/gallery/gal02.jpg';
    showcaseImages[2].src  = 'images/gallery/gal03.jpg';
    showcaseImages[3].src  = 'images/gallery/gal04.jpg';
    showcaseImages[4].src  = 'images/gallery/gal05.jpg';
    showcaseImages[5].src  = 'images/gallery/gal06.jpg';
    showcaseImages[6].src  = 'images/gallery/gal07.jpg';
    showcaseImages[7].src  = 'images/gallery/gal08.jpg';
    showcaseImages[8].src  = 'images/gallery/gal09.jpg';
    showcaseImages[9].src  = 'images/gallery/gal10.jpg';
    showcaseImages[10].src = 'images/gallery/gal11.jpg';
    showcaseImages[11].src = 'images/gallery/gal12.jpg';

var numberOfImages = showcaseImages.length;

function autoSwap() {
    var randomImage=Math.floor(Math.random()*numberOfImages)
    swap('showcaseimage',showcaseImages[randomImage].src);
    setTimeout('autoSwap()',(3000));
}

var objPopUp = null;
var popMapOn = 0;

function popUp(evt,objectID,anchor) {
  if (popMapOn == 1) popHide();
  document.onclick = popHide;
  var evt = (evt) ? evt : ((window.event) ? event : null);
  objPopUp = document.getElementById(objectID);
  objPopUp.style.visibility = 'visible';
  objPopUp.style.display = 'block';
}

function popHide() {
  if (popMapOn == 0) {
    popMapOn = 1;
    return
  }
  else {
    objPopUp.style.visibility = 'hidden';
    objPopUp.style.display = 'none';
    objPopUp = null;
    popMapOn = 0;
    document.onclick = null;
  }
}