The great thing about JQuery is the way it makes accessing elements of the DOM extremely easy. Keeping with that, JQuery has some really nifty expressions built into it that means it even easier. For instance:

jQuery provides some very powerful selection expressions using colon (:) syntax. Things like :first, :odd, and :even let you write code like: $('#content a:first') to get the first anchor within #content, or $('tr:odd') to get the odd numbered rows of a table.

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