I've following HTML code:

<form action=view_rebate_master.php method=post>

  <div class=form-group>

    <label for=company_name class=col-lg-12>Manufacturer</label>

    <div class=col-lg-12>

      <select id=company_id class=form-control onchange=GetProductByManufacturerID(this.value) name=company_id>

        <option selected=selected value=>All Manufacturers</option>

        <option value=40>Test</option>

        <option value=42>RK</option>

        <option value=49>Blue Nun</option>

        <option value=58>Unique Imports</option>

        <option value=59>Pernod Ricard</option>

        <option value=77>Smoking Loon</option>

        <option value=78>Beringer</option>

      </select>

    </div>

  </div>

  <div class=col-xs-4>

    <div class=form-group>

      <label for=product_id class=col-lg-12>Product Name</label>

      <div class=col-lg-12>

        <select id=product_id class=form-control name=product_id>

          <option selected=selected value=>All Products</option>

          <option value=12>Riesling</option>

          <option value=24>Superio Vodka</option>

          <option value=32>Heineken</option>

          <option value=33>Strong Bow</option>

          <option value=34>Grocery</option>

          <option value=35>Ruler</option>

          <option value=36>Glass</option>

          <option value=37>Brown Bread</option>

          <option value=38>White Bread</option>

          <option value=55>Cabernet Sauvignon</option>

        </select>

      </div>

    </div>

  </div>

  <div class=col-lg-12>   

    <div class=col-xs-5>

      <div class=form-group>

      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<button type=submit class=btn btn-primary name=search id=search>Search Rebates</button>

    </div>

  </div>

</div>

The AJAX jQuery code is as follows:

function GetProductByManufacturerID(value) { 

  $.ajax({

    type: POST,

    url: add_rebate_by_quat_volume.php,

    data: { manufacturer_id: value, op: },

    beforeSend: function() { 

      $(#product_id).html('<option> Loading ...</option>');

    },

    success:function(data){ 

      $(#product_id).html('');

      $(#product_id).append(data);

    }

  });

}

I want to make the submit button disable when the AJAX function call is made by changing the value of select control(select control for Manufacturer selection) and it should be disabled till the AJAX success response is received. When AJAX success response will receive the user should be able to click on the submit button. How to achieve this? Thanks in advance.