Mutually exclusive Check Box

Mutually exclusive Check Box

Hi
I have two check box. My requirment is if check one check box the other check box should be unchecked. I don't know how to do this.
Both should be mutually exclusive when checked. But both can be unchecked at the same time.

Here is the HTML.

<html>
<head>
<title>Check Box</title>


<script src="jquery.min.js" type="text/javascript"></script>
   <script type="text/javascript">

$(document).ready(function(){

  });


</script
</head>

<body>
   <b>Mutually Exclusive Checkbox example</b>
<form name="myform">

IncludeZip<input type="checkbox" id="checkbox1" name="checkbox1" ></br>
ExcludeZip<input type="checkbox" id="checkbox2" name="checkbox2" ></br>

</form>
</body>
</html>


Please help.