// Show/Hide DIV by ID
function showhide(elem){
var arrow_hide="images/arrow_red_right.gif";
var arrow_show="images/arrow_red_down.gif";
var v=YAHOO.util.Dom.getStyle(elem, 'visibility');
var i=YAHOO.util.Dom.getStyle(elem+'_', 'src');
	if (v=='visible'){
		YAHOO.util.Dom.setStyle(elem, 'visibility','hidden');
		YAHOO.util.Dom.setStyle(elem, 'display','none');
		if (document.getElementById(elem+'_') ){
			document.getElementById(elem+'_').src=arrow_hide;
		}
	}	
	else{
		YAHOO.util.Dom.setStyle(elem, 'visibility','visible');
		YAHOO.util.Dom.setStyle(elem, 'display','block');
		if (document.getElementById(elem+'_') ){
			document.getElementById(elem+'_').src=arrow_show;
		}
	}
}