themes.js jQuery conversion
Ammending d477d84323d53a6c5c55d64c343c80800e4eaee3

. . . where the selector form element was not passed properly.
Amending e16ce1807b9be19a5f58e96610acb819eb437e4f

. . . where an incorrect image extension was used.
Merge pull request #528 from WildcardSearch/themejs

themes.js jQuery conversion