function open_window(newLoc, newWidth, newHeight) 
{
	if(!newWidth)
		var newWidth = 500;
	if(!newHeight)
		var newHeight = 440;
	
	var fromLeft = 250;
	var fromTop = 200;	

    newWin = window.open(newLoc, "wind", "toolbar=no, location=no, directories=no, menubar=no, scrollbars=no, resizable=no, status=no, top=" + fromTop +", left=" + fromLeft +", height=" + newHeight + ", width="+ newWidth);
    newWin.window.focus();
}