auto add jquery (for floating toolbar) if theme does not use jquery

[bobbyong]

hi my wp theme does not have jquery added by default n i couldn't figure out why diggdigg's floating toolbar did not load on the site. after i tried the sharebar plugin, i noticed diggdigg floating toolbar started loading as well.

searching through the wp plugin forum i saw andrew asking for some other users to check if jquery is added to the theme. i added jquery and it solved my problem but i didn't know what was the problem.

perhaps it might be good for other future users (like what sharebar is doing) to include in the code to check if jquery is alr added in the theme. if jquery is not added, then proceed to append jquery into the theme so floating toolbar works.