<!-- Begin
function toggleLayer( whichLayer )
{
	var myElement, myVisible;
	if( document.getElementById )									// Standard Browsers
		myElement = document.getElementById( whichLayer );
	else if( document.all )											// Older IE Versions
		myElement = document.all[whichLayer];
	else if( document.layers )										// Netscape Navigator 4
		myElement = document.layers[whichLayer];
	
	myVisible = myElement.style;   
	if(myVisible.display=='' && myElement.offsetWidth!=undefined && myElement.offsetHeight!=undefined)
		myVisible.display = (myElement.offsetWidth!=0 && myElement.offsetHeight!=0) ? 'block' : 'none';
	myVisible.display = (myVisible.display=='' || myVisible.display=='block') ? 'none' : 'block';
	
}
// End -->