Preset checkbox
<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>
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