hi all

i want to submit form on click of checkbox but it gives error

Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body>
<form action="" method="post" name="form1">
<input type="checkbox" name="availability[]" id="availability[]" onclick="this.form1.submit();" />Store   
</form>
</body>
</html>
Error
Code:
Error : 'this.form1' is null or not an object
vineet