//requires browsercheck.js

	function hideSpan(span){
		if (is_nav6up){
			eval("document.getElementById('" + span + "').style.visibility = 'hidden'");
		}
		else if (is_nav){
			eval("document." + span + ".visibility = 'hidden'");
		} 
		else {
			eval("document.all." + span + ".style.visibility = 'hidden'");
		}			
	}

	function showSpan(span){
		if (is_nav6up){
			eval("document.getElementById('" + span + "').style.visibility = 'visible'");
		}
		else if (is_nav){
			eval("document." + span + ".visibility = 'visible'");
		} 
		else {
			eval("document.all." + span + ".style.visibility = 'visible'");
		}			
	}