var navActive = -1;
	function setValue(count)
	{
		navActive = count;
	}


	
	function toggle(nr) {
		var count = 0;
		var nav = 8;
		if(nr == "clear") {
			for (i=0; i < nav; i++) {
				document.getElementById('nav'+count).className = 'navMain';
				count++;
				}
				if (navActive != -1) {
				document.getElementById('nav'+navActive).className = 'navMainActv';
				}
			}		
	
		else {
			for (i=0; i < nav; i++) {
				if(document.getElementById('nav'+count).className == 'navMainActv') {
					setValue(count);
				}
				document.getElementById('nav'+count).className = 'navMain';
				count++;
				}
			document.getElementById('nav'+nr).className = 'navMainActv';
			}
		}