var row = '<div class="row marg">';//行

k = 0;

for (var i = 3; i < j.length; i++) {

if (++k % 4 == 1 && k != 1) {

row += '</div><div class="row marg"><div class="col-xs-3 text-center"><div class="pb">' + j[i].name + '</div></div>';//行内数据

}

else {

row += '<div class="col-xs-3 text-center"><div class="pb">' + j[i].name + '</div></div>';

}

console.log(k);//测试用

}

row += '</div>';