JavaScript Tutorial/jQuery/change

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change(fn) fires when a control loses the input focus and its value has been modified since gaining focus.

<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
                
            $("select").change(function () {
                  var str = "";
                  $("select option:selected").each(function () {
                        str += $(this).text() + " ";
                      });
                  $("div").text(str);
                })
                .change();


        });
    </script>
  </head>
  <body>
    <body>
        <select name="sweets" multiple="multiple">
            <option>A</option>
            <option selected="selected">B</option>
            <option>C</option>
            <option selected="selected">D</option>
            <option>E</option>
            <option>F</option>
          </select>
          <div></div>
    </body>
</html>


Trigger change event

<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
                $("select").change(function () {
                  var str = "";
                  $("select option:selected").each(function () {
                        str += $(this).text() + " ";
                  });
                  $("div").text(str);
                })
                .trigger("change");
      
        });
    </script>
  </head>
  <body>
    <body>
    <select name="garden" multiple="multiple">
        <option>A</option>
    
        <option selected="selected">B</option>
        <option>C</option>
        <option selected="selected">D</option>
        <option>E</option>
        <option>F</option>
    </select>
    
    <div></div>
    </body>
</html>