function settingPos(id,menu){
    var obj = menu;
    var subMenuDiv = document.getElementById(id);
    var subMenu = document.getElementById("subMenu");

    if(obj != null && subMenuDiv != null && subMenu != null){
		var x = Math.floor(obj.offsetLeft + obj.offsetWidth/2 - subMenuDiv.offsetWidth/2);
		if(x + subMenuDiv.offsetWidth > subMenu.offsetWidth){
			x = subMenu.offsetWidth - subMenuDiv.offsetWidth;
		}else if(0 > x){
			x = 0;
		}
		subMenuDiv.style.left = x;
	}
}
function showSubMenu(id){
    var subMenuDiv = document.getElementById(id);
    if(subMenuDiv != null){
        subMenuDiv.style.visibility = "visible";
    }
}
function hidSubMenu(id){
    var subMenuDiv = document.getElementById(id);
    if(subMenuDiv != null){
        subMenuDiv.style.visibility = "hidden";
    }
}