function swapDiv(  divs, whichLayer )
{

/*sweaver:10/17/08

given an array of div names, sets selected one to visible and turns the others off


*/



var length = divs.length;
//alert("div name array length:" + divs.length);
for ( var i=0; i < length; i++ )
{
	//alert(i + "div name:" + divs[i]);
	var otherDivs = document.getElementById(divs[i]);
	//alert(otherDiv);
	otherDivs.style.display = 'none';
	//otherDivs.style.visibility = 'hidden';
}



	//alert("left for loop");
  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';
  	
	vis.visibility='visible';
	vis.display='block';
	
}