function toggleVisibility(me){
	if (me.style.visibility=="hidden"){
		me.style.visibility="visible";
	}
	else {
		me.style.visibility="hidden";
	}
}

function port_show(id, num){
	// x.style.visibility is
	// initially empty in IE5 until
	// it is assigned by these
	// functions, so must check that
	// it's not null before proceeding...
	
	// turn off all portfolio display elements 
	//	(num = number of elements on the page)
	for (ii=1; ii<=num; ++ii)
	{	q = document.getElementById('pd'+ii);
		if((q.style)&&(q.style.visibility!=null)){
 		q.style.visibility = 'hidden';
		}
	}
	q = document.getElementById('pd_main');
	if((q.style)&&(q.style.visibility!=null)){
 	q.style.visibility = 'hidden';
	}
	
	// turn on requested portfolio element
	x = document.getElementById(id);
	if((x.style)&&(x.style.visibility!=null)){
 		x.style.visibility = 'visible';
	}
}