function centerPopup(url, w, h, resize) {
	if (resize='yes'){
		resizable=1;
	} else {
		resizable=0;
	}
	var l = ( screen.width - w ) / 2;
	var t = ( screen.height - h ) / 2;
	win = window.open( url, 'popup', 'scrollbars=0,status=yes,menubar=no,toolbar=no,locationbar=no,resizable='+resizable+',resize='+resize+',height=' + h +',width=' + w + ',top=' + t + ',left=' + l);
	//win = window.open( url, 'popup', 'scrollbars=0,status=yes,menubar=no,toolbar=no,locationbar=yes,resize=yes');
	win.focus();
	setTimeout ('win.focus()','1000');
}