JSON but with function de- and encoding. Just use jsonWF to make a JSON string and objWF to make a Object from a JSON string. All methods will remain.

main.js

function jsonWF(obj)
{
	inject(obj,"funcConvert","self");
	var ret = JSON.stringify(obj,funcStringify);
	cleanProb(obj,"funcConvert");
	return ret;
}

function objWF(str)
{
	return transformFuncs(JSON.parse(str));
}

function transformFuncs(obj)
{
	for(key in obj)
	{
		if(typeof obj[key] == "object")
		{
			transformFuncs(obj[key]);
		}
	}
	setFuncs(obj,obj["funcConvert"]);
	cleanProb(obj,"funcConvert",1);
	return obj;
}

function setFuncs(obj,funcs)
{
	for(key in funcs)
	{
		assignFuncFromStr(obj,key,funcs[key]);
	}
}

function assignFuncFromStr(obj,name,str)
{
	eval("obj." + name + " = " + str + ";");
}

function funcStringify(key,value)
{
	if(key=="funcConvert")
	{
		var self = value.self();
		return functionsToObj(self);
	}
	return value;
}

function functionsToObj(obj)
{
	var ret = {};
	for(key in obj)
	{
		if(typeof obj[key] == "function")
		{
			ret[key] = obj[key].toString();
		}
	}
	return ret;
}

function cleanProb(obj,name,maxdepth=null,depth=0)
{
	if(depth<maxdepth || maxdepth==null)
	{
		depth++;
		if(typeof obj == "object")
		{
			for(var key in obj)
			{
				cleanProb(obj[key],name,maxdepth,depth);
			}
			delete obj[name];
		}
	}
}

function inject(obj,name,injection,maxdepth=null,depth=0)
{
	if(depth<maxdepth || maxdepth==null)
	{
		depth++;
		if(typeof obj == "object")
		{
			for(var key in obj)
			{
				inject(obj[key],name,injection,maxdepth,depth);
			}
			obj[name] = injection;
			if(injection==="self")
			{
				obj[name] = {self:function(){return obj;}};
			}
		}
	}
}