function preLoad(){
				var img0 = new Image();
				var img1 = new Image();
				img0.src = "../common/icon_ke_r.gif";
				img1.src = "../index_img/menu/menu_11_r.gif";
			}

			function keOn1(){
				document.images['ke'].src = "../common/icon_ke_r.gif"; }
			function keOff1(){
				document.images['ke'].src = "../common/icon_ke.gif"; }

			var i=64
			function ScrDN(){
				if(i<16000){
					i=i+128; window.scroll(0,i); setTimeout("ScrDN()",1)
				}else{ i=64; }
			}
			
			function mailOn(){
				document.images['mailto'].src = "../index_img/menu/menu_11_r.gif";
				}
	
			function mailOff(){
				document.images['mailto'].src = "../index_img/menu/menu_11.gif";
				}