var intervalID_num;

function showSubmenu(in_str){
	clearHideTimer();

	document.getElementById("GlobalNaviBusiness").style.visibility = "hidden";
	document.getElementById("GlobalNaviService").style.visibility = "hidden";
	document.getElementById("GlobalNaviCompany").style.visibility = "hidden";
	document.getElementById("GlobalNaviRecruit").style.visibility = "hidden";

	// avoid browserError
	if(in_str == "Business" || in_str == "Service" || in_str == "Company" || in_str == "Recruit" ){ 
		document.getElementById("GlobalNavi" + in_str).style.visibility = "visible";
	}
}

function hideSubmenu(){
	document.getElementById("GlobalNaviBusiness").style.visibility = "hidden";
	document.getElementById("GlobalNaviService").style.visibility = "hidden";
	document.getElementById("GlobalNaviCompany").style.visibility = "hidden";
	document.getElementById("GlobalNaviRecruit").style.visibility = "hidden";
	init();
}

function setHideTimer(){
	intervalID_num = setInterval("hideSubmenu()", 500);
}

function clearHideTimer(){
	clearInterval(intervalID_num);
}

function init(){
	clearHideTimer();
	
	if(document.getElementsByTagName("body")[0].getAttribute("id")){
		var pageId_str = document.getElementsByTagName("body")[0].getAttribute("id");
		document.getElementById("GlobalNavi" + pageId_str).style.visibility = "visible";
	}
}