function showSubMenu(menuId){
if (brwsVer>=4) {
if (curSubMenu!='') hideSubMenu();
	if (document.all) {
	eval('document.all.'+menuId).style.visibility='visible';
	} else {
	eval('document.'+menuId).visibility='show';
	}
	curSubMenu=menuId;
}
}
		
function hideSubMenu(){
if (brwsVer>=4) {
if (document.all) {
	eval('document.all.'+curSubMenu).style.visibility='hidden';
	} else {
	eval('document.'+curSubMenu).visibility='hide';
	}
	curSubMenu='';
}
}
		
var brwsVer=parseInt(navigator.appVersion);
var timer;
var curSubMenu='';