//全选checkbox

    function allCheck() {

         //全选input

        var all = $("input[name='all']");

        //全部的input type="checkbox"

        var checboxs = $(".ys_manage_tbody input[name='checkbox']");

         //选中的input type="checkbox"

        var rchecbox = $(".ys_manage_tbody input[name='checkbox']:checked");

        //取消全选

        checboxs.click(function(){

            if(checboxs.length != rchecbox.length) {

                all.removeAttr("checked",false);

            }

            if(checboxs.length == rchecbox.length) {

                all.prop("checked",true);

            }

        });

        //全选操作

        all.click(function () {

            var check = $(this).is(":checked");

            if(check) {

                checboxs.prop("checked",true);

            } else {

                checboxs.removeAttr("checked",false);

            }

        })

    }