How to migrate a .change function from jQuery to plain Javascript -

i'm not js expert think i'm trying pretty simple (at least in jquery)

i've got 3 select

  <select id="faq" class="onchance_fill">...</select>   <select id="pages" class="onchance_fill">...</select>   <select id="faq" class="onchance_fill">...</select> 

and input (it's tinymce 1 in advlink plugin)

<input type="text" onchange="selectbyvalue(this.form,'linklisthref',this.value);" value="" class="mcefocus" name="href" id="href" style="width: 260px;"> 

i want each time change value in 1 of 3 select, value of option, placed in input.

in jquery, :

$('.ajax_onchance_fill').change(function() {         data = $('.ajax_onchance_fill').val();         $('#href').text(data);     }); 

but can't use it. equivalent in plain javascript ?

thanks

i advice keep using jquery speeds kind of thing in pure javascript think want looks this...

 <script type="text/javascript">   function load() {   var elements = document.getelementsbyclassname('onchance_fill');   for(e in elements){       elements[e].onchange = function(){           document.getelementbyid('href').value = this.value;      }          }   } </script>