jQuery错误：Uncaught TypeError: element.attr is not a function

Query错误：Uncaught TypeError: element.attr is not a function
发生错误的语句是if括号里面的那句话。

<script>
    //...

    highlight: function (element, errorClass) {
        $(element).fadeOut(function () {
            $(element).fadeIn();
        });
        $(element).closest(".form-group").addClass(errorClass);

       //if条件里面的语句报错：Uncaught TypeError: element.attr is not a function
        if(element.attr("name") == "category" || element.attr("name") == "location"){
            $(element).next("div.input-group-btn")
                    .children("button:first")
                    .css("border-color", "#d9534f");
        }
    },

    //...