var MENU = null;
	var TIMER;

	//ポップアップメニュー
	function popupMenuOver(id){

		if (MENU && MENU != id){
			popupMenuClose(id);
		}
		popupMenuOpen(id);
	}

	function popupMenuOpen(id){ 

		if(document.getElementById){
			document.getElementById(id).style.visibility = 'visible';
			document.getElementById(id).style.display = 'block';

		}else if(document.all){
			document.all(id).style.visibility = 'visible';
			document.all(id).style.display = 'block';

		}else if(document.layers){
			document.layers[ id ].visibility = 'show';
		}
		clearTimeout(TIMER);
		MENU = id;
	}

	function popupMenuClose(){

		if(document.getElementById){
			document.getElementById(MENU).style.visibility = 'hidden';
			document.getElementById(MENU).style.display = 'none';

		}else if(document.all){
			document.all(MENU).style.visibility = 'hidden';
			document.all(MENU).style.display = 'none';

		}else if(document.layers){
			document.layers[ MENU ].visibility = 'hide';
			
		}
		MENU = null;
	}

	function popupTimeSet(){
		TIMER = setTimeout('popupMenuClose()', 700);
	}

	function popupTimeClear(){
		clearTimeout(TIMER);
	}