一个简单的方式防止表单重复提交

        <form id="luckDrawAdd" method="post" enctype="multipart/form-data">
                <table class="searTabBg" width="100%">
                    <tr>
                        <td style="padding-left: 112px">
                            <button id="confirmSubmit" type="button">
                                <span><span>确认提交</span></span>
                            </button>
                        </td>
                    </tr>
                </table>
        </form>
<script language="JavaScript" type="text/javascript">
    var ctx = '${ctx}';
    $(document).ready(function () {
        //表单是否已经提交
        var isCommitted=false;

        $("#confirmSubmit").click(function () {

            /*防止表单重复提交*/
            if(isCommitted==false){
                isCommitted=true;
            }else{
                alert("请不要重复提交表单!");
                return;
            }
            var formData = new FormData($("#luckDrawAdd")[0]);
            $.ajax({
                type: "post",
                url: '',
                data: formData,
                contentType: false,
                processData: false,
                success: function (data) {
                    console.log(data);
                    if ('0000' == data.responseCode) {
                        alert("添加成功!");
                        window.location.href = '';
                    }
                },
                error: function () {
                    alert("系统异常，添加失败!");
                    /*将表单提交标志改为false*/
                    isCommitted=false;
                }
            });
        });
    });

</script>