JavaScript Reference/Javascript Properties/checked

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"checked" Example

   <source lang="javascript">
   

<html> <body> <form> <script>

   function function1() {
       document.all.R1.checked = true;
   }
   function function2() {
       document.all.R2.checked = true;
   }
   function function3() {
       document.all.R3.checked = true;
   }
   function function4() {
       document.all.R4.checked = true;
   }

</script> <input id="R1" type="radio" name="radiobutton" value="radiobutton">VISA <input id="R2" type="radio" name="radiobutton" value="radiobutton">MASTERCARD <input id="R3" type="radio" name="radiobutton" value="radiobutton">DISCOVER <input id="R4" type="radio" name="radiobutton" value="radiobutton">AMERICAN EXPRESS
<input type="button" value="VISA checked" onClick="function1();"> <input type="button" value="MASTERCARD checked" onClick="function2();"> <input type="button" value="DISCOVER checked" onClick="function3();"> <input type="button" value="AMERICAN EXPRESS checked" onClick="function4();"> </form> </body> </html>


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"checked" is applied to

   <source lang="javascript">

+----------------+--------------------------------------------------------------+ | Applied_To |<input type="checkbox"> <input type="radio"> | +----------------+--------------------------------------------------------------+

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"checked" Possible Values

   <source lang="javascript">

Possible Values true false.


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"checked" Syntax and Note

   <source lang="javascript">

Note: Read and write property. Whether or not a checkbox or radio button is checked.

Syntax:

document.getElementById("inputID").checked = value document.all.inputID.checked = value // IE only


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