Select.onChange : Select : Form JAVASCRIPT TUTORIALS

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Select.onChange

The onChange event handler is fired when the option selected in the select box is changed.



<html>
    <head>
    <script language="JavaScript">
    <!--
    function changeBack(form){
      for (var i = 0; i < form.mySelect.options.length; i++) {
        if (form.mySelect.options[i].selected){
          alert("You have selected " + form.mySelect.options[i].text);
        }
      }
    }
    -->
    </script>
    </head>
    <body>
    <form name="myForm">
      <select name="mySelect" onChange='changeBack(this.form)'>
        <option value=A>AA</option>
        <option value=B>BB</option>
        <option value=C>CC</option>
        <option value=D>DD</option>
      </select>
    </form>
    </body>
    </html>