MVC--全选反选

HTML： 

<td><input type="checkbox" name="checkAll" id="checkAll" onclick="swapCheck()" /></td>

JS：

 <td><input type="checkbox" name="checkId" id="checkId" value="' + this.SId + '" onchange="Getcheckbox()"/></td>

方法：

//checkbox 全选/取消全选
        var isCheckAll = false;
        function swapCheck() {
            if (isCheckAll) {
                $("input[type='checkbox']").each(function () {
                    this.checked = false;
                    Getcheckbox();
                });
                isCheckAll = false;
            } else {
                $("input[type='checkbox']").each(function () {
                    this.checked = true;
                    Getcheckbox();
                });
                isCheckAll = true;
            }
        }
        function Getcheckbox() {
            var str = document.getElementsByName("checkId");
            var objarray = str.length;
            var chestr = "";
            for (i = 0; i < objarray; i++) {
                if (str[i].checked == true) {
                    chestr += str[i].value + ":";
                }
            }
            document.getElementById("checkValue").value = chestr;
        }