# Form validation using RJS

**URL:** <https://www.ruby-forum.com/t/form-validation-using-rjs/131795>\
**Category:** Rails\
**Created:** [March 13, 2008, 10:49am UTC](https://www.ruby-forum.com/t/form-validation-using-rjs/131795 "2008-03-13T10:49:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [March 13, 2008, 10:49am UTC](https://www.ruby-forum.com/t/form-validation-using-rjs/131795/1 "2008-03-13T10:49:47Z")

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Hi  
I have a form as below

\<%= form\_remote\_tag :update =\> “update\_sd\_resolution\_ui”,  
:url =\> { :action =\> ‘sd\_resolution\_save’,  
:id =\> @sd\_ticket.id,  
:sd\_resolution\_id=\>@sd\_resolution\_id},  
:class =\> ‘itilform’%\>

\</table

\<%= end\_form\_tag %\>

HERE HOW CAN I CHECK Hr field contains only numbers .How can i implement  
this using RJS.Say forexample can i call a javascript function for form  
checking from  
form\_remote\_tag above?

Sijo

| Hr: | \<%= text\_field :sd\_resol, "hours", "size" =\> 2 %\> |