/* onload時に設定されるJavaScriptです。*/


//ロールオーバーの設定です。-----------------------------------------------------------------------

function initRollovers() {
	if (!document.getElementById) return

	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_over'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);

			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;

			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}

			aImages[i].onmouseout = aImages[i].onclick = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_over'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}


//ドロップダウンの設定です。-----------------------------------------------------------------------

function initDropdown() {

	if (!document.getElementById) return;

	var dropDown = new Array();
	var ddBtnImage = new Array();
	var ddPreLoad = new Array();
	var ddTempSrc;

	//親メニューの項目数を取得
	Navi = document.getElementById('gmenu');
	ddLength = 0;
	for (var n = 0; n < Navi.childNodes.length; n++) {
		if(Navi.childNodes[n].nodeName == "LI") ddLength++;
	}

	for (var i = 0; i < ddLength; i++) {
		if (null == document.getElementById('dd' + (i+1))) return;

		dropDown[i] = document.getElementById('dd' + (i+1));
		
		//Netscapeバグ回避のため、表示・非表示の切換えをdisplayからvisibilityに変更
		dropDown[i].childNodes[2].style.display = 'block';
		dropDown[i].childNodes[2].style.visibility = 'hidden';
		
		dropDown[i].onmouseover = function(){
			this.childNodes[2].style.visibility = 'visible';
		}

		dropDown[i].onmouseout = function(){
			this.childNodes[2].style.visibility = 'hidden';
		}

	}
	
}


//onload時に関数を呼び出します。-----------------------------------------------------------------------

window.onload = function() {
	initRollovers();
	initDropdown();
}