object_deep_parser.js

function parse_object(obj){
	var stack =[[Object.keys(obj), obj]],
		t = stack[0], 
		o,
		k = t[0].shift();
		
		
		
	while(true){
		while(k){
			if(typeof t[1][k]=="object"){
				o = t[1][k];
				t = [Object.keys(o), o];
				stack.push(t);
			// do something when going down 
			}
			else{
			  // do somethin with value
			}
			
			k = t[0].shift();
		}
		
		while(!k){
			stack.pop();
			t = stack[stack.length-1];
			if(!t) {
				return;
			}
			
			k = t[0].shift();
			
			// do something when going up 
		}
	}
	
}

var test = {
  "type": "FunctionDeclaration",
  "id": {
      "type": "Identifier",
      "name": "test1"
  },
  "params": [],
  "defaults": []
};

parse_object(test);