/* Preload images */	

	var picsgraphics = new Array(
			"_images/graphHBA.jpg",
			"_images/graphHBBHut.jpg",
			"_images/graphHBBLayout.jpg",
			"_images/graphHBeef.jpg",
			"_images/graphHBird.jpg",
			"_images/graphHBlossom.jpg",
			"_images/graphHBoraBora.jpg",
			"_images/graphHDogAhead.jpg",
			"_images/graphHRio.jpg",
			"_images/graphHBoyfeeding.jpg",
			"_images/graphHFCity.jpg",
			"_images/graphHGreatWall.jpg",
			"_images/graphHBigSurTree.jpg",
			"_images/graphHIceMedium.jpg",
			"_images/graphHIGF.jpg",
			"_images/graphHMD.jpg",	
			"_images/graphHHotelonThames.jpg",
			"_images/graphHTBridge.jpg",
			"_images/graphHWestminster.jpg",
			"_images/graphHThames.jpg",
			"_images/graphVMP.jpg",
			"_images/graphVCWharfReflection.jpg",
			"_images/graphVHCClock.jpg",
			"_images/graphVTBox.jpg");
	
			
	
	var preloadgraphics = new Array();
		for(var i=0; i<picsgraphics.length; i++) {
			preloadgraphics[i] = new Image();
			preloadgraphics[i].src = picsgraphics[i];
		}


	var picstxt = new Array(
			'"La Boca, Buenos Aires"',
			'"Bora Bora"',
			'"Beach Scene"',
			'"Technicolour Beef"',
			'"Scarlet Macaw"',
			'"Blossom"',
			'"Aerial View of Islands"',
			'"Little Dog"',
			'"Rio de Janeiro"',
			'"Boy Feeding Birds"',
			'"Forbidden City"',
			'"Great Wall of China"',
			'"Big Sur"',
			'"Ice Palace"',
			'"Iguassu Falls"',
			'"Paris"',
			'"River Thames"',
			'"Tower Bridge"',
			'"Westminster"',
			'"Windsor"',
			'"Machu Picchu"',
			'"Canary Wharf"',
			'"Hampton Court"',
			'"Telephone Box"');
				

	
/* Swap thumbnails in Gallery */

	function swap(n) {
	
		if(document.layers){
 		//thisbrowser="NN4";
 				if (n<20) {
 				document.Hlayer.visibility="show";
 				document.Vlayer.visibility="hide";
 				document.images.bigHpic.src= preloadgraphics[n].src;
				}
				else
				if (n>19) {
				document.Hlayer.visibility="hide";
 				document.Vlayer.visibility="show";
				document.images.bigVpic.src= preloadgraphics[n].src;
				}
		}
		else
		if(document.all){
		//thisbrowser="ie"
				if (n<20) {
				document.all.Hlayer.style.visibility="visible"; 
				document.all.Vlayer.style.visibility="hidden"; 
				document.images.bigHpic.src= preloadgraphics[n].src;
				}
				else
				if (n>19) {
				document.all.Hlayer.style.visibility="hidden";
				document.all.Vlayer.style.visibility="visible"; 
				document.images.bigVpic.src= preloadgraphics[n].src;
				}
		}
		else
		if(!document.all && document.getElementById){
		//thisbrowser="NN6";
				if (n<20) {
				document.getElementById("Hlayer").style.visibility="visible"; 
				document.getElementById("Vlayer").style.visibility="hidden"; 
				document.images.bigHpic.src= preloadgraphics[n].src;
				}
				else
				if (n>19) {
				document.getElementById("Hlayer").style.visibility="hidden"; 
				document.getElementById("Vlayer").style.visibility="visible"; 
				document.images.bigVpic.src= preloadgraphics[n].src;
				}
		}
	
		var div = document.getElementById("footertxtGalleryPage").firstChild;
		div.replaceData(0, div.length, picstxt[n]);
	}