// open the Pop-up Login window
function popup_login (url, h, w, extras) {
// initilize variables
	var props = "left=0,top=0,resizable=1,scrollbars=1,status=1,menubar=0,toolbar=0";
// append the list of properties to the default properties
	if ( extras != "" ) {
		props += ","+ extras;
	}
// require a height and width to be specified
	if ( w == "" || h == "" ) {
		return false;
	} else {
// open the Pop-up Login window
		popupLogin = window.open(url, "popupLogin", "width="+ w +",height="+ h +","+ props);
		
		
		
	}
}