# Problem about javascript in RoR

**URL:** <https://discuss.rubyonrails.org/t/problem-about-javascript-in-ror/18079>\
**Category:** rubyonrails-talk\
**Created:** [September 12, 2007, 4:31pm UTC](https://discuss.rubyonrails.org/t/problem-about-javascript-in-ror/18079 "2007-09-12T16:31:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AlphaEleven](https://avatars.discourse-cdn.com/v4/letter/a/8491ac/32.png) [@AlphaEleven](https://discuss.rubyonrails.org/u/AlphaEleven)\
**Post date:** [September 12, 2007, 4:31pm UTC](https://discuss.rubyonrails.org/t/problem-about-javascript-in-ror/18079/1 "2007-09-12T16:31:31Z")

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The problem is that if i want to change the value of a html element like textfield in the function in controller, how can i get that?

example:

def ...... #like following \<javascript tag change the element's value\>

end

---

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**Author:** ![Ivor\_Paul](https://avatars.discourse-cdn.com/v4/letter/i/ecae2f/32.png) [@Ivor\_Paul](https://discuss.rubyonrails.org/u/Ivor_Paul)\
**Post date:** [September 13, 2007, 2:36am UTC](https://discuss.rubyonrails.org/t/problem-about-javascript-in-ror/18079/2 "2007-09-13T02:36:22Z")

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Try

page[‘id\_of\_element’].value = “new value”

Ivor