/* COMMON METODS */


/* Check if value is made from digins only */
function IsNumeric(sText) {

    var ValidChars = "0123456789";
    var IsNumber=true;
    var Char;
    
    for (i = 0; i < sText.length && IsNumber == true; i++) { 
    
        Char = sText.charAt(i); 
        
        if (ValidChars.indexOf(Char) == -1) {
        
            IsNumber = false;
            
        }
        
    }
    
    return IsNumber;
    
}
    
    

/* Validate USA ZIP code */
function validateUsaZIP(zip) {
    
    var zip_length = parseInt(zip.length);
    
    if (zip_length==5) {
        return IsNumeric(zip);
    }
    
    if (zip_length==10) {
        var parts = zip.split('-');
        if (!parts[0] || !parts[1]) {
        
            return false;
        
        }
        return IsNumeric(parts[0]) && IsNumeric(parts[1]);
    }
    
    return false;
    
}



/**
   *
   *  URL encode / decode
   *  http://www.webtoolkit.info/
   *
   **/
   
var Url = {
 
    // 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;
    }
 
}