<input type="checkbox" name="color[]" value="blue" [[!+fi.color:FormItIsChecked=`blue`]] atr="10"> Blue
<input type="checkbox" name="color[]" value="Red " [[!+fi.color:FormItIsChecked=`red`]] atr="20"> Red
<input type="checkbox" name="color[]" value="Green" [[!+fi.color:FormItIsChecked=`green`]] atr="30" > Green