// _h : which ID name to (h)ide
// _s : which ID name to (s)how
function toggle(_h,_s) {
	if (document.all) { // is IE
		eval("document.all."+_h+".style.visibility='hidden';");
		eval("document.all."+_h+".style.display='none';");
		eval("document.all."+_s+".style.visibility='visible';");
		eval("document.all."+_s+".style.display='';");
	} else { // is NS? 
		eval("document.getElementById('"+_h+"').style.visibility='hidden';");
		eval("document.getElementById('"+_h+"').style.display='none';");
		eval("document.getElementById('"+_s+"').style.visibility='visible';");
		eval("document.getElementById('"+_s+"').style.display='';");
	}
}