SZ=L or S Use this to control the width of the display box.
The default of 'L' (large) has a width of 380 pixels, whilst the 'S'
(small) option has a width of 290 pixels.
BC=blue Border colour (default navy). Any web recognised colour can
be entered (ie green, red, orange, white), or if known, the web-standard
hexadecimal notation (green=008000 ,blue=0000ff, red=ff0000, orange=ffa500 etc)