function popUp(menuName) {

	if( navigator.appName == 'Opera' || navigator.appName == 'Netscape' ) {
		var aboutSw = document.getElementById("menuAbout");
		var spiritSw = document.getElementById("menuSpirit");
	} else {
		var aboutSw = document.getElementById("menuAboutIE");
		var spiritSw = document.getElementById("menuSpiritIE");
	}

	if ( menuName == "menuAbout" ) { aboutSw.style.visibility = "visible"; }
	if ( menuName == "menuSpirit" )  { spiritSw.style.visibility = "visible";  }

}


function popDown(menuName) {

	if( navigator.appName == 'Opera' || navigator.appName == 'Netscape' ) {
		var aboutSw = document.getElementById("menuAbout");
		var spiritSw = document.getElementById("menuSpirit");
	} else {
		var aboutSw = document.getElementById("menuAboutIE");
		var spiritSw = document.getElementById("menuSpiritIE");
	}

	aboutSw.style.visibility = "hidden";
	spiritSw.style.visibility = "hidden";

}