function togglebranch(source)
{
 	//alert(source.name);
 	//alert(source.parentNode.className)
 	if(source.parentNode.className=="")
 	{
 	 	
 	}
	else if(source.parentNode.className=="closed")
 	{
 	 	source.parentNode.className="open";
 	}
 	else
 	{
 	 	source.parentNode.className="closed";
 	}	
 
}