// 画像先読み
function preloadImg() {
	var imgNameArray = new Array('outline', 'history', 'rinen', 'flow');
	if(document.images) {
		for(var i in imgNameArray) {
			var imgName = imgNameArray[i];
			var menuImg = new Image();
			menuImg.src = "../img/" + imgName + "_menu.jpg";
		}
	}
}

// 左メニュー
function rollOver(changeImg) {
	if(document.images) {
		var leftMenuImg = document.images['leftmenu'];
		leftMenuImg.src = "../img/" + changeImg + "_menu.jpg";
	}
}
function rollOut(sourceImg) {
	if(document.images) {
		var leftMenuImg = document.images['leftmenu'];
		leftMenu.src = "../img/" + sourceImg + "_menu.jpg";
	}
}

// 新規ウィンドウ
function openWindow(imgName, w, h) {
	window.open(imgName, '', 'scrollbars=yes, resizable=no, width=' + w + ', height=' + h);
}

// スクロール
function softScrollBack() {
	var scrj = 1;
   if(navigator.appName == "Microsoft Internet Explorer" && document.compatMode == "CSS1Compat") {
      var scdist = document.body.parentNode.scrollTop;
   } else {
      var scdist = document.body.scrollTop;
   }
   if(scrj<50 && scdist) {
      scdist = (scdist>2) ? Math.ceil(scdist*.2) : 1;
      scrj++;
      scrollBy(0,-scdist);
      setTimeout("softScrollBack()",20);
   } else {
      scrollTo(0,0);
      scrj = 1;
   }
}