window.name='mainframe';

  	function timeCheck(forwhat) {	
			lev = forwhat;
			n = setTimeout("showlevel(lev)", 400);
		}
		
		function showlevel(level) {
			// alle Menülisten per se deaktivieren
			if ($('nav1')) {
				$('nav1').style.display='none';
			} if ($('nav2')) {
				$('nav2').style.display='none';
			} if ($('nav3')) {
				$('nav3').style.display='none';
			} if ($('nav4')) {
				$('nav4').style.display='none';
			} if ($('nav5')) {
				$('nav5').style.display='none';
			} 

			// alle nachfolgenden Header wegklappen
			h_level1 = 'h' + level;
			if ($(h_level1)) { $(h_level1).style.display='block'; }
			for (i = level+1; i <= 5; i++) {
				h_level2 = 'h' + i;
				if ($(h_level2)) { $(h_level2).style.display='none'; }
			}
			
			/*if ($('nav6'))
				$('nav6').style.display='none';*/
				
			name = 'nav' + level;
			if ($(name))
				$(name).style.display='block';
		}
		
		function showElement(name) {
			if ($(name))
				$(name).style.display='block';
		}
		
		function hideElement(name) {
			if ($(name))
				$(name).style.display='none';
		}			
		
		function zeigeBA() {
		  document.getElementByID('ba').style.backgroundColor = "#afd8c8";
			document.getElementByID('ba').style.backgroundImage = "url('../rechtsoben.gif')";
			document.getElementByID('ba').style.cursor = "pointer";
		}