// JSON.asString() function
function asString(obj) {
	 
	switch (typeOf(obj)){
		case 'string':
			obj = obj.replace(new RegExp('(["\\\\])', 'g'), '\\$1');
			
			// flash does not handle %- characters well. transforms "50%" to "50pct" (a dirty hack, I admit)
			obj = obj.replace(/^\s?(\d+)%/, "$1pct");
			return '"' +obj+ '"';
			
		case 'array':
			return '['+ map(obj, function(el) {
				return asString(el);
			}).join(',') +']'; 
			
		case 'function':
			return '"function()"';
			
		case 'object':
			var str = [];
			for (var prop in obj) {
				if (obj.hasOwnProperty(prop)) {
					str.push('"'+prop+'":'+ asString(obj[prop]));
				}
			}
			return '{'+str.join(',')+'}';
	}
	
	// replace ' --> "  and remove spaces
	return String(obj).replace(/\s/g, " ").replace(/\'/g, "\"");
}


// private functions
function typeOf(obj) {
	if (obj === null || obj === undefined) { return false; }
	var type = typeof obj;
	return (type == 'object' && obj.push) ? 'array' : type;
}