js合并json数据

var json1 = {
  a:1,
  b:2
}
var json2 = {
  c:3,
  d:4
}
var json = mergeObject(json1, json2);
//result
  {
    a:1,
    b:2,
    c:3,
    d:4
   }
function mergeObject(destination, source) {
    for (var property in source)
        destination[property] = source[property];
    return destination;
}