CurrentOn = 0;

		function PreImgLoad(Title, imgNum) {
			imgNum++;
			rollOn = new Array(imgNum);
			rollOff = new Array(imgNum);
			for (i = 1; i <= imgNum; i++) {
				if (i < 10) {
					tmp = "_0";
				} else {
					tmp ="_";
				}
				rollOn[i] = new Image();
				rollOn[i].src = Title + tmp + i + "_on.gif";
				rollOff[i] = new Image();
				rollOff[i].src = Title + tmp + i + "_off.gif";
			}
		}
	
		function imgOn(Num) {
			if (rollOn[Num] != null) {
				document["r"+Num].src = rollOn[Num].src;
			}
		}

		function imgOff(Num) {
			if (rollOn[Num] != null) {
				if (Num != CurrentOn) {
					if (CurrentOn != 0) {
						document["r"+CurrentOn].src = rollOn[CurrentOn].src;
					}
					document["r"+Num].src = rollOff[Num].src;
				}
			}
		}

		function imgHit(Num) {
			if (rollOn[Num] != null) {
				if (CurrentOn != 0) {
					document["r"+CurrentOn].src = rollOff[CurrentOn].src;
				}
				document["r"+Num].src = rollOn[Num].src;
				CurrentOn = Num;
			}
		}	
		
		
	var old_menu = '';
	function menuclick(submenu){
		if( old_menu != submenu ) {
			if( old_menu !='' ) {
			old_menu.style.display = 'none';
			}
		submenu.style.display = 'block';
		} 
		else {
		submenu.style.display = '';
		}
	old_menu = submenu;
	}