<select id='sd'>
  <option value ="111">aaa</option>
  <option value ="222">bbb</option>
  <option value="333">ccc</option>
  <option value="444">ddd</option>
</select>

<input type='text' id='mecode'>

<script> $( function() {

 

  

    function log( message ) {
  
 
 

  

    $( "<div>" ).text( message ).prependTo( "#log" );
  
 
 

  

    $( "#log" ).scrollTop( 0 );
  
 
 

  

    }
  
 
 

  

          var file=("#select1  option:selected").val();+'jsp'
  
 
 

  

    $( "#mecode" ).autocomplete({
  
 
 

  

    source: function( request, response ) {
  
 
 

  

    $.ajax( {
  
 
 

  

    url: file,
  
 
 

  

    dataType: "jsonp",
  
 
 

  

    data: {
  
 
 

  

    term: request.term
  
 
 

  

    },
  
 
 

  

    success: function( data ) {
  
 
 

  

    response( data );
  
 
 

  

    }
  
 
 

  

    } );
  
 
 

  

    },
  
 
 

  

    minLength: 2,
  
 
 

  

    select: function( event, ui ) {
  
 
 

  

    log( "Selected: " + ui.item.value + " aka " + ui.item.id );
  
 
 

  

    }
  
 
 

  

    } );
  
 
 

  

    } );
  
 

  </script>

I want to change the value of SELECT, will change the remote access to the file, why the error?