function pop(title, width, height, filename)
{
	thefile=filename;
	var w = 480, h = 340;

	if (document.all || document.layers) {
	w = screen.availWidth;
	h = screen.availHeight;
	}
	
	var leftPos = (w-width)/2, topPos = (h-height)/2;
		
	popbox=window.open(thefile,title,"status=yes,toolbar=no,scrollbars=yes,resizable=yes,directories=no,menubar=no,width="+width+",height="+height+",top=" + topPos + ",left=" + leftPos);
	
	if(popbox !=null)
	{
		if (popbox.opener==null)
		{
			popbox.opener=self;
		}
	}
}

function pop_no(title, width, height, filename) {
    thefile = filename;
    var w = 480, h = 340;

    if (document.all || document.layers) {
        w = screen.availWidth;
        h = screen.availHeight;
    }

    var leftPos = (w - width) / 2, topPos = (h - height) / 2;

    popbox = window.open(thefile, title, "status=yes,toolbar=no,scrollbars=no,resizable=yes,directories=no,menubar=no,width=" + width + ",height=" + height + ",top=" + topPos + ",left=" + leftPos);

    if (popbox != null) {
        if (popbox.opener == null) {
            popbox.opener = self;
        }
    }
}