//ボタンのロールオーバー
			function changeNb(arg) {
				if (document.images) {
					rslt = new Image();
					rslt.src = arg;
					return rslt;
				}
			}

			function nbChange() {
				if (document.images && (preloadFlag == true)) {
					for (var i=0; i<nbChange.arguments.length; i+=2) {
					document[nbChange.arguments[i]].src = nbChange.arguments[i+1];
					}
				}
			}

//記のロールオーバー
			function changeKi(arg) {
				if (document.images) {
					rslt = new Image();
					rslt.src = arg;
					return rslt;
				}
			}

			function kiChange() {
				if (document.images && (preloadFlag == true)) {
					for (var i=0; i<kiChange.arguments.length; i+=2) {
					document[kiChange.arguments[i]].src = kiChange.arguments[i+1];
					}
				}
			}
    
//プリロード
			var preloadFlag = false;
			function preloadImages() {
				if (document.images) {
					SOKAN_over = changeNb("img/top/sokan_over.gif");
					nb01_over = changeNb("img/nb/01w_over.gif");
					nb02_over = changeNb("img/nb/02w_over.gif");
					nb03_over = changeNb("img/nb/03w_over.gif");
					nb04_over = changeNb("img/nb/04w_over.gif");
					nb05_over = changeNb("img/nb/05w_over.gif");
					ki00_over = changeKi("img/top/ki00.gif");
					ki01_over = changeKi("img/top/ki01.gif");
					ki02_over = changeKi("img/top/ki02.gif");
					ki03_over = changeKi("img/top/ki03.gif");
					ki04_over = changeKi("img/top/ki04.gif");
					ki05_over = changeKi("img/top/ki05.gif");
					preloadFlag = true;
				}
			}