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    Why in the unholy name of cuthulu would you not know the name of an ID tag? Commented Dec 22, 2011 at 16:58
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    @Incognito, there are lots of times when you don't know the ID... If you're using ajax to generate new blocks of code you may be generating unique IDs along with new JS... in these cases you need to make sure that the IDs being references are the same in the js are they are in the resulting code block. There are lots more instances like this and it's pretty common when ajax is involved or there are large blocks of code dependent on a server-side if-else statement etc Commented Dec 22, 2011 at 17:10
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    @raynjamin I don't even understand how you put yourself into situations where that's what you're doing... or why you'd select by class, then list tags, then ID attributes which have a hidden css value, that selector man... it's actually paining me to look at... I don't even know where to start with... like... what? Are you cutting+pasting massive blocks of code or something to make things work over multiple IDs? I don't even... like... my brain. it's exploding here. Commented Dec 22, 2011 at 21:18
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    Go read about the dom/html/whatever... use a search engine... Why have I never had to do stuff like this with dynamic HTML? Commented Dec 22, 2011 at 21:59
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    no. you don't understand how ID tags work. I understand exactly what you're saying. Commented Dec 22, 2011 at 23:18