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';
}

function toggleSection( whichLayer )  {
	hideRest( 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';
}

function hideRest( whichLayer )  {
		var myArray = new Array();
		myArray[0] = 'vitalife';
		myArray[1] = 'engine';
		myArray[2] = 'industrial';
		myArray[3] = 'agriculture';
		myArray[4] = 'metalworking';
		myArray[5] = 'specialty';
		for ( var i=0; i<myArray.length; i++ ) {
			if( myArray[i] != whichLayer ) {

				  var elem, vis;
				  if( document.getElementById ) // this is the way the standards work
				    elem = document.getElementById( myArray[i] );
				  else if( document.all ) // this is the way old msie versions work
				      elem = document.all[myArray[i]];
				  else if( document.layers ) // this is the way nn4 works
				    elem = document.layers[myArray[i]];
				  vis = elem.style;
					vis.display = ((vis.display==''||vis.display=='none')||vis.display=='block')?'none':'block';
					

			}
		}
}