I'm going to second this. Crockford's book Javascript the good parts helped me a ton when getting up to speed in javascript. Ended up building a timecard javascript application for mobile.
I'll also recommend spending a little time with javascript before jumping into jQuery. learning how things are scoped is important.
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Read everything that Crockford has said about Javascript: http://javascript.crockford.com/ and especially don't miss his videos.
I'm going to second this. Crockford's book Javascript the good parts helped me a ton when getting up to speed in javascript. Ended up building a timecard javascript application for mobile.
I'll also recommend spending a little time with javascript before jumping into jQuery. learning how things are scoped is important.