# javascript function needs rails variable

**URL:** <https://discuss.rubyonrails.org/t/javascript-function-needs-rails-variable/38765>\
**Category:** rubyonrails-talk\
**Created:** [January 28, 2009, 6:02am UTC](https://discuss.rubyonrails.org/t/javascript-function-needs-rails-variable/38765 "2009-01-28T06:02:56Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rabia](https://avatars.discourse-cdn.com/v4/letter/r/6f9a4e/32.png) [@Rabia](https://discuss.rubyonrails.org/u/Rabia)\
**Post date:** [January 28, 2009, 6:02am UTC](https://discuss.rubyonrails.org/t/javascript-function-needs-rails-variable/38765/1 "2009-01-28T06:02:56Z")

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\<script type="text/javascript"\>

&nbsp;&nbsp;&nbsp;&nbsp;document.getElementById('h').checked=true; &nbsp;&nbsp;&nbsp;&nbsp;show\_coords(\<%= @pic\_comments.to\_json %\>,"main",'\<%=$domain%\>/ users/update\_picture\_div',\<%= @picture.id %\>)

\</script\> I have implement this but rails variables are not working.

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**Author:** ![jeff\_emminger](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@jeff\_emminger](https://discuss.rubyonrails.org/u/jeff_emminger)\
**Post date:** [January 28, 2009, 3:41pm UTC](https://discuss.rubyonrails.org/t/javascript-function-needs-rails-variable/38765/2 "2009-01-28T15:41:17Z")

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This will only work if that script block is in an .erb template.

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**Author:** ![Rabia](https://avatars.discourse-cdn.com/v4/letter/r/6f9a4e/32.png) [@Rabia](https://discuss.rubyonrails.org/u/Rabia)\
**Post date:** [January 29, 2009, 4:23am UTC](https://discuss.rubyonrails.org/t/javascript-function-needs-rails-variable/38765/3 "2009-01-29T04:23:19Z")

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it starts working Cheers Rabia Akhtar