js print_r

 var print_r = function(tar){
  var str = '';
  for (var p in tar) {
   var tmp = eval("tar['" + p.toString() + "']");
   if (tmp != null && tmp.toString != null && tmp.toString() != ''){
    if (str != '') str += ", ";
    str += p.toString() + " = " + tmp.toString();
   }
  }
  return str;
 }