# Javascript in rjs?

**URL:** <https://www.ruby-forum.com/t/javascript-in-rjs/145111>\
**Category:** Rails\
**Created:** [August 6, 2008, 4:42am UTC](https://www.ruby-forum.com/t/javascript-in-rjs/145111 "2008-08-06T04:42:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jturney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e99b99/32.png) [@jturney](https://www.ruby-forum.com/u/jturney)\
**Post date:** [August 6, 2008, 4:42am UTC](https://www.ruby-forum.com/t/javascript-in-rjs/145111/1 "2008-08-06T04:42:31Z")

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Hi, I’m trying to see if an element exists in my rjs:

exists = document.getElementById(“checkX”)

Something to that extent… how do I add that into the rjs?

Thanks

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<div class="post-metadata">

**Author:** ![jturney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e99b99/32.png) [@jturney](https://www.ruby-forum.com/u/jturney)\
**Post date:** [August 6, 2008, 8:31am UTC](https://www.ruby-forum.com/t/javascript-in-rjs/145111/2 "2008-08-06T08:31:37Z")

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page \<\< “exists = document.getElementById(“checkX”)”

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<div class="post-metadata">

**Author:** ![jturney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e99b99/32.png) [@jturney](https://www.ruby-forum.com/u/jturney)\
**Post date:** [August 6, 2008, 1:41pm UTC](https://www.ruby-forum.com/t/javascript-in-rjs/145111/3 "2008-08-06T13:41:48Z")

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Or u can do like

page \<\< “if($(‘checkX’)){”  
Do what u need here  
page \<\< “}”