function highNav(imgname) {
		  document.getElementById("navmap").src='graphics/nav_'+imgname+'.png';
	  }
	  function norm() {
		document.getElementById("navmap").src='graphics/nav.png';  
	  }
	function fullView(url,gall) {
		  document.getElementById('overlay').style.width='825px';
		  document.getElementById('overlay').style.height='550px';
		  var matchpos = url.search(gall+'_thumb');
		  var newurl = url.substring(matchpos);
		  var newurl = newurl.replace(gall+'_thumbs/'+gall+'_thumb%20(','');
		  var newurl = newurl.replace(').jpg','');
		  document.getElementById('overlay').innerHTML="<img title='Click on this image to close the window' onclick='closeView()' class='fullsize' src='art/"+gall+"/"+gall+" ("+newurl+").jpg'><br />Click on the image to close this window";
	  }
	 function closeView() {
		  document.getElementById('overlay').style.width='0px';
		  document.getElementById('overlay').style.height='0px';
		  document.getElementById('overlay').innerHTML="";
	  }