gistfile1.txt

var planOptions = [
  {
    service:"mail",
    plans: [
      {
        name: "exchange",
        plandId: ""
      }
    ]
  },
  {
    service:"backup",
    plans: [
      {
        name: "...",
        plandId: ""
      }
    ]
  }
]
  

for ( var i = 0, len = planOptions.length; i < len; i += 1 ) { 

  var option = planOptions[i];
  
  option.service;
  option.plans;
  
  for (var j = 0, jlen = option.plans.length; j < jlen; j += 1) {
  
    option.plans[i].name;
    option.plans[i].planId;
  
  }

}