wordpress - which file is better to add jquery in modal form -

i need add jquery on click, when contact form open's in modal window. i'm trying on console , it's working, when try add on file, nothing changes.my code is

jquery('.fl_box-menu-0 ').click(function(){        var myclone = jquery('.container_inner .title_subtitle_holder span').clone();        jquery(myclone).prependto("#cboxcontent form");      })   

so need copy title page header, , paste in top of modal contact form. form can find here word press web site

and click contact me. when try in console add

           var myclone = jquery('.container_inner .title_subtitle_holder span').clone();        jquery(myclone).prependto("#cboxcontent form");   

it work , add title, when try add code in file, nothing changes. wrong? use contact form 7, , form lightbox modal. i'm looking file, add jquery code, make working.

i try delegated event:

jquery(document).on('click', '.fl_box-menu-0', function() {    var myclone = jquery('.container_inner .title_subtitle_holder span').clone();    jquery(myclone).prependto("#cboxcontent form");   }) 

reasons using delegated events can found here.

it's not clear if issue, or issue, if click not working except, , console is, chances click not getting bound (dynamic element perhaps).