function Phonesortfn(a,b) {
  //Comparing "+a+" and "+b
  if (a[0]<b[0]) return -1;
  if (a[0]>b[0]) return 1;
  return 0;
}

//function to sort an array (by the first element if 2d array)
function sortPhoneListArray(objList)
{
//alert("test");
objList.sort(Phonesortfn);
return objList;
}