function showhide(varname, varval){
	if (varval=="open") {
		eval('document.getElementById("'+varname+'").style.visibility="visible"');
		eval('document.getElementById("'+varname+'").style.display="block"');
		eval('document.getElementById("'+varname+'img").src="images/menu/toggleclose.gif"');
		eval(varname+"='close'");
		if(varname == 'hgroup4')
		{
			document.getElementById("ad").style.display='none';
		}
	}
	else {
		eval('document.getElementById("'+varname+'").style.visibility="hidden"');
		eval('document.getElementById("'+varname+'").style.display="none"');
		eval('document.getElementById("'+varname+'img").src="images/menu/toggleopen.gif"');
		eval(varname+"='open'");
		if(varname == 'hgroup4')
		{
			document.getElementById("ad").style.display='';
		}
	}
}
var hgroup1="open";
var hgroup2="close";
var hgroup3="open";
var hgroup4="open";