JavaScript DHTML/jQuery/Form RadioButton

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Get form radio button

    
<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript">
    $(document).ready(function(){
        var input = $("input:radio");
        $("div").text(input.length);
        
        
    });
    </script>
  </head>
  <body>
     <form>
      <input type="radio" />
    </form>
     <div></div>
  </body>
</html>



Preset radiobutton

    
<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
          $("input").val(["check1","check2", "radio1" ]);
     
        });
    </script>
  </head>
  <body>
    <body>
      <input type="checkbox" name="checkboxname" value="check1"/> check1
      <input type="checkbox" name="checkboxname" value="check2"/> check2
      <input type="radio"  name="r" value="radio1"/> radio1
      <input type="radio"  name="r" value="radio2"/> radio2
  </body>
</html>



Select the radio button

 
<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
                $("#single").val("Single2");
                $("#multiple").val(["Multiple2", "Multiple3"]);
                $("input").val(["check1","check2", "radio1" ]);
        });
    </script>
    <style>
      .selected { color:red; }
      .highlight { background:yellow; }
    </style>    
  </head>
  <body>
    <body>
          <select id="single">
            <option>1</option>
            <option>2</option>
          </select>
          <select id="multiple" multiple="multiple">
            <option selected="selected">Multiple</option>
            <option>Multiple2</option>
            <option selected="selected">Multiple3</option>
          </select><br/>
        
          <input type="checkbox" name="checkboxname" value="check1"/> check1
          <input type="checkbox" name="checkboxname" value="check2"/> check2
          <input type="radio"  name="r" value="radio1"/> radio1
          <input type="radio"  name="r" value="radio2"/> radio2
    </body>
</html>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/jQuery/Form_RadioButton&oldid=2967»