javascript object equality

objeq.js

// y and x can be whatever you look for equality
function objeq(y,x)
{
  var p;
  for(p in y) {
      if(typeof(x[p])=='undefined') {return false;}
  }

  for(p in y) {
      if (y[p]) {
          switch(typeof(y[p])) {
              case 'object':
                  if (!objeq(y[p],x[p])) { return false; } break;
              case 'function':
                  if (typeof(x[p])=='undefined' ||
                      (p != 'equals' && y[p].toString() != x[p].toString()))
                      return false;
                  break;
              default:
                  if (y[p] != x[p]) { return false; }
          }
      } else {
          if (x[p])
              return false;
      }
  }

  for(p in x) {
      if(typeof(y[p])=='undefined') {return false;}
  }

  return true;
}