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<script type="text/javascript">
    function modifyDetail() {
        var v = document.getElementById("isDelete");   
        if(v.checked) {
            return confirm("Are you sure delete?");
        }else {
            return confirm("Are you sure update?");
        }
    }
</script>
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<script type="text/javascript">
    function modifyDetail() {
        var v = document.getElementById("isDelete");   
        if(v.checked) {
            var action = document.getElementById("f1");   
            f1.action = "delectBlacklist";
            f1.submit;
            return confirm("Are you sure delete?");
        }else {
            return confirm("Are you sure update?");
        }
    }
</script>