function toggleVis(clicked,dest)
{
  var entry = Array();
	entry[0] = 'Realtime';
	entry[1] = 'Models';
	entry[2] = 'Sculpture';
	entry[3] = 'Drawing';
	entry[4] = 'Sketch';
	entry[5] = 'Design';
	entry[6] = 'Tutorial';
	entry[7] = 'Me';
	var element = Array();
	var cM = document.getElementById(clicked+'L1');
	var i = 0;
	
	if (is_ie) var disp = 'inline';
	else var disp = 'table-row';
	while ( i <= 7) {
		element[i] = document.getElementById(entry[i]+'L1');
		if (element[i]!=cM)
		  element[i].style.display='none';
		i++;
	}
		if (cM.style.display==disp)
			cM.style.display='none';
		else
		cM.style.display=disp;
		
		if (dest) document.getElementById('content').src=dest;
}
function move(dest) {
  if (dest) document.getElementById('content').src=dest;
}