function openWindow(url) {
	//	determine window dimensions and 
	//  point of window creation.
	var spawnWidth = 558;		// this defines the new window width
	var spawnHeight = 244;		// this defines the new window height
	var spawnLeft = (screen.width / 2) - (spawnWidth / 2);
	var spawnTop = (screen.height / 2) - (spawnHeight / 2);
    tallWin = window.open(url,'tall','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width='+spawnWidth+',height='+spawnHeight+',left='+spawnLeft+',top='+spawnTop+',fullscreen=no');
    if (navigator.appName == 'Netscape') {
	    tallWin.focus();
    };
};