json array, remove all elements contained in another json array

Hello Experts,

I've seen several examples on the web filtering arrays, using for example jQuery grep.
But all i see i a little more simple than what i want.

Maybe this is more simple that i think..

I have this two arrays:

var searchtag_catg       = [{ id: 2, tb: 'text2', search: 'test2'},{ id: 4, tb: 'text4', search: 'test4'}];

var categories       = [{ id: 1, tb: 'text1', search: 'test1'},{ id: 2, tb: 'text2', search: 'test2'},{ id: 3, tb: 'text3', search: 'test3'},{ id: 4, tb: 'text4', search: 'test4'}];

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And i want to show the records in the array categories that are not in searchtag_catg array, using the id key...
How can i do this?

Thx in advanced :)
Miguel