function clear() {
	document.images["dreamscapeImg"].src="../graphics/images/categories/dreamscape.gif";
	document.images["placeImg"].src="../graphics/images/categories/place.gif";
	document.images["structureImg"].src="../graphics/images/categories/structure.gif";
	document.images["detailImg"].src="../graphics/images/categories/detail.gif";
	document.images["jasonImg"].src="../graphics/images/categories/bio.gif";
	document.images["contactImg"].src="../graphics/images/categories/contact.gif";	document.images["atworkImg"].src="../graphics/images/categories/atwork.gif"
         document.images["momentsImg"].src="../graphics/images/categories/moments.gif"
	document.images["portraitsImg"].src="../graphics/images/categories/portraits.gif"
	document.images["canadaImg"].src="../graphics/images/categories/events.gif";
}


// Method to switch the navigation
function switchCategory(category) {
	clear();
	
	if (category == 'dreamscape') {
		document.images["dreamscapeImg"].src="../graphics/images/categories/selected/dreamscape.gif";
	} else if (category == 'place') {
		document.images["placeImg"].src="../graphics/images/categories/selected/place.gif";
	} else if (category == 'structure') {
		document.images["structureImg"].src="../graphics/images/categories/selected/structure.gif";
	} else if (category == 'detail') {
		document.images["detailImg"].src="../graphics/images/categories/selected/detail.gif";
	
	} else if (category == 'jason') {
		document.images["jasonImg"].src="../graphics/images/categories/selected/bio.gif";	
	} else if (category == 'contact') {
		document.images["contactImg"].src="../graphics/images/categories/selected/contact.gif";

	} else if (category == 'atwork') {
		document.images["atworkImg"].src="../graphics/images/categories/selected/atwork.gif";

	} else if (category == 'moments') {
		document.images["momentsImg"].src="../graphics/images/categories/selected/moments.gif";

	} else if (category == 'portraits') {
		document.images["portraitsImg"].src="../graphics/images/categories/selected/portraits.gif";
	
	} else if (category == 'canada') {
		document.images["canadaImg"].src="../graphics/images/categories/selected/events.gif";	
	}
}


// Usage: preloadImages('image 1 URL', 'image 2 URL', 'image 3 URL', ...);
function preloadImages() {
  if (document.images) {
    if (typeof(document.WM) == 'undefined'){
      document.WM = new Object();
    }
    document.WM.loadedImages = new Array();
    // Loop through all the arguments.
    var argLength = preloadImages.arguments.length;
    for(arg=0;arg<argLength;arg++) {
      // For each arg, create a new image.
      document.WM.loadedImages[arg] = new Image();
      // Then set the source of that image to the current argument.
      document.WM.loadedImages[arg].src = preloadImages.arguments[arg];
    }
  }
}