从下拉列表中选择值时，值会显示在文本框中

I'll try my level best by using AJAX, but I'm not able to get this to work.

I have 5 select boxes and 5 text boxes, and when I select the first drop down its value is shown in a text box and so on with the other text boxes.

I have been trying this:

ajax: {
        url: 'help/ajax_help.php',
        type: 'GET',
        data: {help: function(){return $(this).attr('id');}},               
      },

Taking the current value of the dropdown, but it is not working.

Please help me.

Thanks and Regards.

ajax: {
        url: 'help/ajax_help.php',
        type: 'GET',
        data: $(this).val(),
      },

Does that work?