$(document).ready(function() {  
      $(function(){
        $("input#inter").click(function(){
        $.getJSON("/index.php/ajax/location/" + $(this).val(),{ajax: 'true'}, function(j){
            var options = '';
            for (var i = 0; i < j.length; i++) {
                options += '<option value="' + j[i].value + '">' + j[i].label + '</option>';
            }
            $("select#location").html(options);
            $("option:first", "select#location").attr("selected","selected");
            })
        $("#dspecialism").hide();
        $("#dsalary").hide();
        })
        });
      $(function(){
        $("input#uk").click(function(){
        $.getJSON("/index.php/ajax/location/" + $(this).val(),{ajax: 'true'}, function(j){  
            var options = '';
            for (var i = 0; i < j.length; i++) {
                options += '<option value="' + j[i].value + '">' + j[i].label + '</option>';
            }
            $("select#location").html(options);
            $("option:first", "select#location").attr("selected","selected");
            })
        $("#dspecialism").show();
        $("#dsalary").show();
          })
        });
      $(function(){
        $("select#discipline").change(function(){
        $.getJSON("/index.php/ajax/specialism/" + $(this).val(),{ajax: 'true'}, function(j){  
            var options = '';
            for (var i = 0; i < j.length; i++) {
                options += '<option value="' + j[i].value + '">' + j[i].label + '</option>';
            }
            $("select#specialism").html(options);
            $("option:first", "select#specialism").attr("selected","selected");
            })
          })
        });
});