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Form resubmit on Refresh

I had issue with resubmitting the form  when user refresh the form. i had to disable this accidental behavior in the MVC3. Yes of cause we can redirect to another action to prevent this behavior. but in my case i do not want to do that. there fore i used following JavaScript to disable browser refresh and back button.

<script>
    window.history.forward(1);
    document.attachEvent("onkeydown", my_onkeydown_handler);
    function my_onkeydown_handler() {
        switch (event.keyCode) {

            case 116: // 'F5' 
                event.returnValue = false;
                event.keyCode = 0;
                window.status = "F5 disabled";
                break;
        }
    } 
</script>
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