// JavaScript Document
function divSwapper(thediv) {
	var div = document.getElementById(thediv);
	div.style.display = "block";
	switch(thediv)
	{
	case "lightgreendiv":
		div = document.getElementById("midgreendiv");
		div.style.display = "none";
		var div = document.getElementById("darkgreendiv");
		div.style.display = "none";
		var div = document.getElementById("lightgreendivSelection");
		div.className = "lightgreencell";
		var div = document.getElementById("midgreendivSelection");
		div.className = "darkgreencell";
		var div = document.getElementById("darkgreendivSelection");
		div.className = "darkgreencell";
  	break;    
	case "midgreendiv":
		var div = document.getElementById("lightgreendiv");
		div.style.display = "none";
		var div = document.getElementById("darkgreendiv");
		div.style.display = "none";
		var div = document.getElementById("midgreendivSelection");
		div.className = "lightgreencell";
		var div = document.getElementById("lightgreendivSelection");
		div.className = "darkgreencell";
		var div = document.getElementById("darkgreendivSelection");
		div.className = "darkgreencell";
	break;
	case "darkgreendiv":
		var div = document.getElementById("midgreendiv");
		div.style.display = "none";
		var div = document.getElementById("lightgreendiv");
		div.style.display = "none";
		var div = document.getElementById("darkgreendivSelection");
		div.className = "lightgreencell";
		var div = document.getElementById("midgreendivSelection");
		div.className = "darkgreencell";
		var div = document.getElementById("lightgreendivSelection");
		div.className = "darkgreencell";
	break;
	}
}

	function toggleLayer( whichLayer )
{
  var elem, vis;
  if( document.getElementById ) // this is the way the standards work
    elem = document.getElementById( whichLayer );
  else if( document.all ) // this is the way old msie versions work
      elem = document.all[whichLayer];
  else if( document.layers ) // this is the way nn4 works
    elem = document.layers[whichLayer];
  vis = elem.style;
  // if the style.display value is blank we try to figure it out here
  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
  vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}