function showPulldown(plist){
		var a = plist.getElementsByTagName('a')[0];
		var pd = plist.getElementsByTagName('ul')[0];
		
		a.className = "on";
		if(pd) pd.style.display = 'block';
	}
	
	function hidePulldown(plist){
		var a = plist.getElementsByTagName('a')[0];
		var pd = plist.getElementsByTagName('ul')[0];
		
		a.className = "";
		if(pd) pd.style.display = 'none';
	}