// JavaScript Document
// JavaScript Document
function hideLayer( on, off1, off2)
{
  var elemOn, elemOff1, elemOff2, visOn, visOff1, visOff2;
  if( document.getElementById ) // this is the way the standards work
  {
    elemOn   = document.getElementById( on );
    elemOff1 = document.getElementById( off1 );	
	elemOff2 = document.getElementById( off2 );	
  }
	visOn   = elemOn.style;
    visOff1 = elemOff1.style;
	visOff2 = elemOff2.style;
  // if the style.display value is blank we try to figure it out here
	if(visOn.display==''&&elemOn.offsetWidth!=undefined&&elemOn.offsetHeight!=undefined)
	if ( elemOn.offsetWidth != 0 && elemOn.offsetHeight != 0 )
	{
		visOn.display = 'none';
		visOff1.display = 'none';	
		visOff2.display = 'none';
	}
	else
	{
		visOn.display = 'block';
		visOff1.display = 'none';
		visOff1.display = 'none';		
	}
	if (  visOn.display == '' || visOn.display == 'block' )
	{
		visOn.display = 'none';
		visOff1.display = 'none';
		visOff2.display = 'none';		
	}
	else
	{
		visOn.display = 'block';
		visOff1.display = 'none';		
		visOff2.display = 'none';		
	}
}