jquery checkbox （选中和取消选中事件on("change")）做笔记

$("#btn_Company").attr("disabled", "disabled");

            $("#agency").on("change", function () {
                //点击之后如果变成打钩时触发
                if ($(this).attr("checked") == "checked") {
                    $("#txt_NumCompany_").removeAttr("disabled");
                    $("#btn_Company").attr("disabled", "disabled");
                }
               //点击之后变为不是打钩时触发
                else
                {
                    $("#txt_NumCompany_").attr("disabled", "disabled");
                    $("#btn_Company").removeAttr("disabled");
                }
            });

            //选择
            $("#btn_Company").click(function () {
                if ($("#agency").attr("checked") == "checked") {
                    return false;
                } else {
                    PW.getWindow("/CCR/CcrCompanyManage.aspx?NngaSettingId=" + $("#txt_Id_").val(), "选择公司", 800, 500);
                }

            });

原文：http://www.cnblogs.com/kexb/p/5055366.html