var curr					= "default";
var showHide				= function(el)
{
	if(el == curr)
	{
		return;	
	}
	else
	{
		document.getElementById(curr).style.display = "none";
		document.getElementById(el).style.display = "block";
		curr				= el;
	}
}

function popUp(mylink, windowname)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
window.open(href, windowname, 'width=500,height=234,scrollbars=no');
return false;
};