i have seen resume's of many developers they had put expert in JS and Jquery .is that they will right the script form the scratch or they will download and customize to their requirements ??even i known this ..so shall i put JS and Jquery in my profile.?

If you have used javascript and jquery before while developing web pages then you can put it, why not? You can never be sure how expert you are because there is always someone better, but if you are familiar with you can add it.

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