function mainMenu(xType,lang){
	switch(xType){
		case "about" :
				document.getElementById("subMenuBlank").style.display = "none";
				document.getElementById("subMenuAbout").style.display = "block";
				if(lang=="en"){
					document.getElementById("menu_about").src = "/template/images/about_main.jpg";
				}else{
					document.getElementById("menu_about").src = "/template/images/about_th_active.jpg";				
				}
			break;
		case "career" :
				document.getElementById("subMenuBlank").style.display = "none";
				document.getElementById("subMenuCareer").style.display = "block";
				if(lang=="en"){
					document.getElementById("menu_career").src = "/template/images/career_main.jpg";
				}else{
					document.getElementById("menu_career").src = "/template/images/careertips_th_active.jpg";				
				}
			break;
		default :
			break;
	}
}

function reCalMenu(xType,lang){
	switch(xType){
		case "about" :
				document.getElementById("subMenuAbout").style.display = "none";
				document.getElementById("subMenuBlank").style.display = "block";
				if(lang=="en"){
					document.getElementById("menu_about").src = "/template/images/about1.jpg";
				}else{
					document.getElementById("menu_about").src = "/template/images/about_th.jpg";				
				}
			break;
		case "career" :
				document.getElementById("subMenuCareer").style.display = "none";
				document.getElementById("subMenuBlank").style.display = "block";
				if(lang=="en"){
					document.getElementById("menu_career").src = "/template/images/career1.jpg";
				}else{
					document.getElementById("menu_career").src = "/template/images/careertips_th.jpg";				
				}
			break;
		default :
			break;
	}
}