var newwindow = '';

function createPopup( url ) {
	if ( ! newwindow.closed && newwindow.location ) {
		newwindow.location.href = url;
	}
	else {
		newwindow = window.open( url,'name', 'scrollbars=yes,status=yes,resize=yes,width=300,height=300' );
		if ( ! newwindow.opener ) {
			newwindow.opener = self;
		}
	}
	if (window.focus) {
		newwindow.focus()
	}
	return false;
}