jquery获取当前按钮、截取字符串、字符串拼接、动态循环添加元素

截取字符串；字符串拼接；动态循环添加元素：
获取当前按钮：

{data : null, render: function(data, type, row ) {
    var loginName = $("#loginName").val();
    var div = $("<div class=\'btn-group\'></div>");
    var button1 = $("<button role=\'download\' value=\'" + row[5] + "\' name=\'download\'  class=\'btn btn-xs btn-info glyphicon glyphicon-save\' title=\'下载\'></button>");
    var button2 = $("<button role=\'pass\' name=\'edit\' " +
        "data-templatename=\'"+ row[1] + "\' " +
        "data-reportsumid=\'" + row[0] + "\' " +
        "data-cycle=\'" + row[2] + "\' " +
        "data-sumpeople=\'" + row[4] + "\' " +
        "class=\'btn btn-xs btn-info glyphicon glyphicon-edit\' title=\'传阅\'></button>");
        if(row[4]!=loginName&&row[6]==\'1\'){//已汇总但登录人不是汇总人时不能下载
            button1.attr("disabled", true);
        }
        if($("#ifPassRole").val()=="no"){
            button2.attr("disabled",true);
        }
        div.append(button1).append(button2);
    return div[0].outerHTML;
}

showPassModel : function(e){
    var viewSelf = this;//获取按钮对象，不能直接取到当前操作按钮，需要转换。
    var $btn=$(e.currentTarget);  //获得当前操作按钮
    var templateName = $btn.data(\'templatename\');　　//获取当前按钮绑定的数据
    var reportSumId = $btn.data(\'reportsumid\');
    $.ajax({
        type:"POST",
        url:$$ctx + "/reportResultQuery/queryUsersByRoleId",
        data:{
            roleId:"480"
        },
        success:function(result){
            $("#div-passName").html("");
            var htmlContent = "";
            $.each(result.data,function(i,item){            //动态循环添加元素
                htmlContent += \'<input name="checkedUser" type="checkbox" value="\'+item.ssoId+\'" />\'+"&nbsp;&nbsp;"+item.userName+\'</br>\';
            });
            $(htmlContent).appendTo($("#div-passName"));
        }
    });
    $("#passModal").modal("show");
    viewSelf.saveFunction(templateName,reportSumId);        //传递参数
},

saveFunction : function(templateName,reportSumId){
    $("button[role=\'saveFunction\']").click(function(){
        var str1 = "";
        $("input[name=\'checkedUser\']:checked").each(function(){
            str1 += $(this).val()+",";                                //checkbox    获取选中数据    $.each();
        });
        $.ajax({
            type:"POST",
            url:$$ctx + "/reportResultQuery/savePassUser",
            data:{
                readUserId:str1.substring(0, str1.length-1),            //截取字符串    String.substring();
                templateName:templateName,
                reportSumId:reportSumId
            },
            success:function(result){
                $("button[role=\'saveFunction\']").unbind("click");        //解绑按钮，防止多次弹出    $.unbind("click");
            }
        });
        $("#passModal").modal("hide");
    });
}