var gnaviAlpha = new function(){

	/* get item */
	var menu = [];
	//menu[n]       : navi
	//menu[n].a     : navi's link
	//menu[n].child : navi's child	
	(function(){
		var naviP = document.getElementById('mgzHeadNavi');
		var naviC = document.getElementById('mgzHeadNaviChild');	
		var li = naviP.getElementsByTagName('li');
		var cnt = 0;
		for(i=0; i<li.length; i++){
			if(li[i].className=='naviParent'){			
				menu[cnt] = li[i];
				menu[cnt].a = menu[cnt].getElementsByTagName('a')[0];
				menu[cnt].num = menu[cnt].id.replace('mgzHeadNavi','');
				menu[cnt].child = document.getElementById('mgzHeadNaviChild'+menu[cnt].num);
				menu[cnt].child.a = menu[cnt].child.getElementsByTagName('a');
				menu[cnt].timer = -1;
				
				for(j=0; j<menu[cnt].child.a.length; j++){
					menu[cnt].child.a[j].img = menu[cnt].child.a[j].getElementsByTagName('img')[0];
					/*preload*/
					var pimg = new Image();
					pimg.src = menu[cnt].child.a[j].img.src.replace('_of','_ov');
				}
				cnt++;
			}
		}
	})();

	

	var save = -1;
	/* event set */
	(function(){
		for(i=0; i<menu.length; i++){
			menu[i].a.i = i;
			menu[i].child.i = i;

			//menu over
			menu[i].a.onmouseover = function(){
				childOn(this.i);
			}
			//child over
			menu[i].child.onmouseover = function(){
				childOn(this.i);
			}
			//item out
			menu[i].a.onmouseout = function(){
				var id = this.i;
				childOff(this.i);
			}
			menu[i].child.onmouseout = function(){
				childOff(this.i);
			}

			for(j=0; j<menu[i].child.a.length; j++){
				//menu[i].child.a[j].img = menu[i].child.a[j].getElementsByTagName('img')[0];
				menu[i].child.a[j].onmouseover = function(){
					this.img.src = this.img.src.replace('_of','_ov');
				}
				menu[i].child.a[j].onmouseout = function(){
					this.img.src = this.img.src.replace('_ov','_of');
				}
			}
		}
	})();	

	/* move func */
	function childOn(id){
		if(!menu[id].a.dFlg){menu[id].a.className = 'childOn';}
		menu[id].child.style.display = 'block';
	}
	function childOff(id){
		if(!menu[id].a.dFlg){menu[id].a.className = '';}
		menu[id].child.style.display = 'none';
	}
}