local caching and JSON bugs.

/**
 * Standard JSON encoder.
 */

JSON_toString = function (obj) {
    function df(n) {
        return n < 10 ? '0' + n : n;
    }
    var m = {
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        };
    switch(typeof obj) {
        case 'string':
            
            // fixme - this needs to do better escaping!
            var ret = '"';
            for(var i = 0;i<obj.length;i++) {
                if (m[obj[i]]) {
                    ret += m[obj[i]];
                    continue;
                }
                ret += obj[i];
            }
            return ret + '"';
        
        case 'boolean': 
            return  String(obj) ;
            
        case 'date':
            return '"' + obj.getFullYear() + '-' +
                df(obj.getMonth() + 1) + '-' +
                df(obj.getDate()) + 'T' +
                df(obj.getHours()) + ':' +
                df(obj.getMinutes()) + ':' +
                df(obj.getSeconds()) + '"';
            
        
        case 'number': 
            return isFinite(obj) ? String(obj) : "null";
        
        case 'object':
            return JSON_ObjectToString(obj);
            
        case 'array':
            return JSON_ArrayToString(obj);
        
        default: 
            return '';
    }
    
}; 

 

function JSON_ObjectToString(obj)
{
    var a = ['{'], b;

    function p(k, s) {
        if (b) {
            a.push(',');
        }
        
        a.push(JSON_toString(k), ':', s);
        b = true;
    }

    
    for (var i in obj) {
       
        if (!obj.hasOwnProperty(i)) {
            continue;
        }
        
        var v = obj[i];
        switch (typeof v) {
            case 'undefined':
            case 'function':
            case 'unknown':
                break;
            case 'object':
                if (!v) {
                    p(i, 'null');
                    break;
                }
            default:
                p(i, JSON_toString(v));
                break;
        }
    }
    //alert('keys = ' + tmps);
    
    a.push('}');
    //alert(a.join(''));
    return a.join('');
}
 
 
function JSON_ArrayToString(obj)
{
    var a = ['['], b,  l = obj.length;

    function p(s) {
        if (b) {
            a.push(',');
        }
        a.push(s);
        b = true;
    }
    
    for (var i = 0; i < l; i += 1) {
        var v = this[i];
        switch (typeof v) {
            case 'undefined':
            case 'function':
            case 'unknown':
                break;
            case 'object':
                if (!v) {
                    p("null");
                    break;
                }
            default:
                p(JSON_toString(v));
        }
    }
    a.push(']');
    return a.join('');
}