for(var i = 0; i < a.length; i++)
{
   for(var j = 0; j < b.length; j++)
   {
      if(a[j] === '1' && b[i].value === '')
      {
          console.log(b[i].value) //empty
          console.log(b[2].value) //expected value
      }
   }
}