JavaScript Reference/Javascript Properties/index

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"index" Example

   <source lang="javascript">
   

<html> <body> <select id="myS" size=5>

  <option id="o1">1</option>
  <option id="o2">2</option>
  <option id="o3">3</option>
  <option id="o4">4</option>
  <option id="o5">5</option>

</select> <input type="button" value="1" onClick="function1(o1);"> <input type="button" value="2" onClick="function1(o2);"> <input type="button" value="3" onClick="function1(o3);"> <input type="button" value="4" onClick="function1(o4);"> <input type="button" value="5" onClick="function1(o5);"> <script language="JavaScript">

   function function1(elem) {
       alert("Index: "+ elem.index);
   }

</script> </body> </html>


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"index" is applied to

   <source lang="javascript">

+----------------+--------------------------------------------------------------+ | Applied_To |<option> | +----------------+--------------------------------------------------------------+

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"index" Syntax and Note

   <source lang="javascript">

Note: Read and write property. Specifies the index number of <option> in a <select>.

Syntax:

document.getElementById("optionID").index = value document.all.optionID.index = value // IE only


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