# Js.erb ERROR invalid XML character

**URL:** <https://www.ruby-forum.com/t/js-erb-error-invalid-xml-character/158204>\
**Category:** Rails\
**Created:** [January 20, 2009, 3:15pm UTC](https://www.ruby-forum.com/t/js-erb-error-invalid-xml-character/158204 "2009-01-20T15:15:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![da991319](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@da991319](https://www.ruby-forum.com/u/da991319)\
**Post date:** [January 20, 2009, 3:15pm UTC](https://www.ruby-forum.com/t/js-erb-error-invalid-xml-character/158204/1 "2009-01-20T15:15:08Z")

</div>

Good morning,

i am trying to write a js.erb.

\<% if current\_user.login == “admin” %\>  
var hide = false;  
\<% else %\>  
var hide = true;  
\<% end %\>

or

\<% escape\_javascript(if current\_user.login == “admin”) %\>  
var hide = false;  
\<% escape\_javascript(else) %\>  
var hide = true;  
\<% escape\_javascript(end) %\>

but every time I got an error in firebug: “invalid XML character”.

Can’t we just embended ruby in a javascript file?

Thank you