Bg Repeat [Optional]
Specifies how to fill background of a layer with Bg Image, default value is repeat.
If the Bg Image property is not specified, this property will be ignored.
Posible values are repeat, repeat-x, repeat-y, space, round or no-repeat.

Note the equivalent html code looks like <div style="background-repeat:repeat|repeat-x|repeat-y|space|round|no-repeat" >