function switch_product_img(divName, totalImgs) {
			for (var i=1; i<=totalImgs; i++) {
				var showDivName = 'photo_' + i;
				var showObj = null;

				if( document.getElementById ) {
    					showObj = document.getElementById(showDivName);
					if (showDivName == divName){
						showObj.style.display = 'block';
					}
					else {
						showObj.style.display = 'none';
					}
   				}
				else {
   					if( document.layers ) {   
    						showObj = document.showDivName;
						if (showDivName == divName){
							showObj.display = 'block';
						}
						else {
							showObj.display = 'none';
						}
   					}
					else {

						if( document.all ) {
    						showObj = document.all.showDivName;
						if (showDivName == divName){
							showObj.style.display = 'block';
						}
						else {
							showObj.style.display = 'none';
							}
   						} 
					} 
				}
			}
		}

		function show_default_img(itemname) {

				if (document.getElementById) { // DOM3 = IE5, NS6
					document.getElementById(itemname).style.display = 'none';
				}
				else {
					if (document.layers) { // Netscape 4
						document.itemname.display = 'none';
					}
					else { // IE 4
					document.all.itemname.style.display = 'none';
					}
				}
		}