/**
 * Versione js di in_array() PHP
 * 
 */
function in_array (needle, haystack, strict) 
{
    var key = '';
    strict 	= !!strict;
 
    if (strict) 
    {
        for (key in haystack) 
        {
            if (haystack[key] === needle) {
                return true;
            }
        }
    } 
    else 
    {
        for (key in haystack)
        {
            if (haystack[key] == needle) {
                return true;
            }
        }
    }
 
    return false;
}

/**
 * Versione js di is_array() PHP
 * 
 */
function is_array(input)
{
    return typeof (input) == 'object' && (input instanceof Array);
}

/**
 * Versione js di sprintf() PHP semplice (un solo argomento)
 * 
 */
function sprintf(format, arg)
{
	format = format.split('%s');
	format = format[0] + arg + format[1];
	
	return format;
}

/**
 * URL encode / decode
 * http://www.webtoolkit.info/
 * 
 */
var UrlText = {
    // public method for url encoding
    encode : function (string) {
        return escape(this._utf8_encode(string));
    },

    // public method for url decoding
    decode : function (string) {
        return this._utf8_decode(unescape(string));
    },

    // private method for UTF-8 encoding
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode : function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if ((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }
}