win1 = null;

function openWindow(id)

{
	if (win1 == null || navigator.appName != "Netscape" || win1.closed)
	{
	 	opt  = "dependent=0,toolbar=1,location=1,directories=0,status=1,menubar=1,scrollbars=1,resizable=1,copyhistory=0,width=640,height=350";
		if (navigator.appVersion.substring(0, 1) >= 4)
		{
			xpos = screen.availWidth/3-250;
		 	ypos = screen.availHeight/3-150;
			opt += ",screenX="+xpos+",screenY="+ypos+",left="+xpos+",top="+ypos;
		}
		win1 = window.open(id,"win1",opt);
		win1.focus();
	}
	else
	{
		win1.location = id;
		win1.focus();
	}
}

function ok()
{
	return true;
}
window.onerror = ok;