function search() {
if (document.searchform.search.value=="") {
		alert("Please enter some search text.");
		document.searchform.search.focus();
		}
	else {
document.searchform.submit();}
}

var popup;
function popWindow(linkobj) {
var url='http:\/\/' + linkobj;
var windowleft=(screen.width-500)/2;
var windowtop=(screen.height-500)/2;
if (popup == null || popup.closed) {
 popup=window.open(url, "", "width=600,height=400,resizable=yes,location=yes,status=yes,scrollbars=yes,location=yes,left="+windowleft+",top="+windowtop+",screenx=10,screeny=10,toolbar=yes,menubar=yes,directories=yes");
}
else {
		// window's already open; bring to front
		popup.focus()
	}

}

// toggle visibility of event arrow
function toggleon(group) {
	(document.getElementById(group).style.visibility = 'visible');
}

function toggleoff(group) {
	(document.getElementById(group).style.visibility = 'hidden');
}