var prxAJAX = {};

prxAJAX.getXmlHttp = function()
{
        var xmlHttp = null;
        try {
                xmlHttp = new XMLHttpRequest();
        } catch (e) {
                var progIds = ['MSXML2.XMLHTTP', 'Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0'];
                var success = false;
                for (var iterator = 0; (iterator < progIds.length) && ( ! success); iterator ++) {
                        try {
                                xmlHttp = new ActiveXObject(progIds[iterator]);
                                success = true;
                        } catch (e) {}
                }
                 if ( ! success ) {
                        return null;
                }
        }
        return xmlHttp;
};

prxAJAX.serialize = function(data)
{
        if (data == null) {
                return 'N;';
        }

        var type = typeof(data);
        var code = '';
        var iterator = 0;
        var length = null;
        var asciiCode = null;
        var key = null;

        if (type == 'boolean') {
                code += 'b:' + (data ? 1 : 0) + ';';
        } else if (type == 'number') {
                if (Math.round(data) == data) {
                        code += 'i:' + data + ';';
                } else {
                        code += 'd:' + data + ';';
                }
        } else if (type == 'string') {
                length = data.length;
                for (iterator = 0; iterator < data.length; iterator ++) {
                        asciiCode = data.charCodeAt(iterator);
                        if ((asciiCode >= 0x00000080) && (asciiCode <= 0x000007FF)) {
                                length += 1;
                        } else if ((asciiCode >= 0x00000800) && (asciiCode <= 0x0000FFFF)) {
                                length += 2;
                        } else if ((asciiCode >= 0x00010000) && (asciiCode <= 0x001FFFFF)) {
                                length += 3;
                        } else if ((asciiCode >= 0x00200000) && (asciiCode <= 0x03FFFFFF)) {
                                length += 4;
                        } else if ((asciiCode >= 0x04000000) && (asciiCode <= 0x7FFFFFFF)) {
                                length += 5;
                        }
                }
                code += 's:' + length + ':"' + data + '";';
        } else if (type == 'object') {
                if (typeof(data.__class) == 'undefined') {
                        length = 0;
                        if (
                        (typeof(data.length) == 'number') &&
                        (data.length > 0) &&
                        (typeof(data[0]) != 'undefined')) {
                                for (iterator = 0; iterator < data.length; iterator ++) {
                                        if (typeof(data[iterator]) != 'function') {
                                                code += prxAJAX.serialize(iterator);
                                                code += prxAJAX.serialize(data[iterator]);
                                                length ++;
                                        }
                                }
                        } else {
                                for (key in data) {
                                        if (typeof(data[key]) != 'function') {
                                                if (/^[0-9]+$/.test(key)) {
                                                        code += prxAJAX.serialize(parseInt(key));
                                                } else {
                                                        code += prxAJAX.serialize(key);
                                                }
                                                code += prxAJAX.serialize(data[key]);
                                                length ++;
                                        }
                                }
                        }
                        code = 'a:' + length + ':{' + code + '}';
                } else {
                        code += 'O:' + data.__class.length + ':"' + data.__class + '":' + data.__size + ':{';
                        if (data.__meta != null) {
                                for (key in data.__meta) {
                                        if (typeof(data[key]) != 'function') {
                                                code += prxAJAX.serialize(key);
                                                code += prxAJAX.serialize(data[key]);
                                        }
                                }
                        }
                        code += '}';
                }
        } else {
                code = 'N;'
        }
        return code;
};

prxAJAX.sendData = function (w, d, b, u, a){

  var link = (typeof(u)=='string' && u!='') ? u : location.href;
     show = (a==1) ? 1 : 0;

     __xml=prxAJAX.getXmlHttp();
     __xml.open("POST",link,false);
     __xml.setRequestHeader('Content-Type','PRXCMS/AJAX');
     __xml.setRequestHeader('X-PRXCMS-CLIENT','PRXCMS/AJAX');
     data = prxAJAX.serialize({opcode:w,block:b,data:d});
     __xml.send(data);
  if((__xml.responseText.indexOf('<b>Parse error</b>:')!=-1)||
        (__xml.responseText.indexOf('<b>Fatal error</b>:')!=-1)||
        (__xml.responseText.indexOf('<b>Warning</b>:')!=-1)||
        (__xml.responseText.indexOf('escdbsqlerror')!=-1))     {
          alert("<B>ERROR IN CMS ENGINE:</b><br><br>" + __xml.responseText);
          return null;
     }
     if (show) {
          alert(__xml.responseText);
     }
     if (__xml.responseText!='') {
                        try {
                        eval('var $$$= ' + __xml.responseText + ';');
                        } catch(e) {
                                alert("IAJAXR: Status: "+__xml.status+", URL: "+link+", Request: "+data+" Response: "+__xml.responseText);
                                var $$$='';
                        }
            return $$$;
        }
};

prxAJAX.apRAND= function(min,max)
{
        if(min==null)min=10000;
        if(max==null)max=32767;
        return Math.floor(Math.random()*(max-min))+min;
};

function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
        return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
        return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}