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;
    }

}

var Base64 = {

    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode : function (codeinput) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        codeinput = Base64._utf8_encode(codeinput);

        while (i < codeinput.length) {

            chr1 = codeinput.charCodeAt(i++);
            chr2 = codeinput.charCodeAt(i++);
            chr3 = codeinput.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
            this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
            this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

    // public method for decoding
    decode : function (codeinput) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        codeinput = codeinput.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < codeinput.length) {

            enc1 = this._keyStr.indexOf(codeinput.charAt(i++));
            enc2 = this._keyStr.indexOf(codeinput.charAt(i++));
            enc3 = this._keyStr.indexOf(codeinput.charAt(i++));
            enc4 = this._keyStr.indexOf(codeinput.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    // 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;
    }

}

var objAjax = {
	reqObj : '',
	xmlData : "",
	sendData : "",
	base64_encode : false,
	requestURL : 'remote.php',
	callbackFunction :'',
	objCallback :'',

	setSendData : function (addDataName, addDataValue){
		
		// needs to be a string to send
		if(typeof(addDataValue) == "number"){
			addDataValue = ''+addDataValue;
		}
//addDataValue = Base64._utf8_encode(addDataValue);
		//if(this.base64_encode == true){
		//	addDataValue = Base64.encode(addDataValue);
		//}
		//

		if(this.sendData.length > 0){
			this.sendData = this.sendData + '&';
		}

		this.sendData = this.sendData + addDataName + '=' + Url.encode(addDataValue);
		
	},

	clearSendData : function (){
		this.sendData = '';
	},
	

	newRequest : function (callbackFunctionName,params) {
		this.clearSendData();
		this.callbackFunction = '';

		if(callbackFunctionName){
			this.setReturnFunction(callbackFunctionName,params);
		}

	},

	post : function ()
	{

		// branch for native XMLHttpRequest object
		if (window.XMLHttpRequest) {
			this.reqObj= new XMLHttpRequest();
			this.reqObj.onreadystatechange = this.processReqChange;
			this.reqObj.open('POST', this.requestURL, true);
			this.reqObj.setRequestHeader('Content-Type', 'application/x-www-form-URLencoded');
			this.reqObj.send(this.sendData);
		// branch for IE/Windows ActiveX version
		} else if (window.ActiveXObject) {
			this.reqObj = new ActiveXObject('Microsoft.XMLHTTP')
			if (this.req) {
				this.reqObj.onreadystatechange = this.processReqChange;
				this.reqObj.open('POST', this.requestURL, true);
				this.reqObj.setRequestHeader('Content-Type', 'application/x-www-form-URLencoded');
				this.reqObj.send(this.sendData);
			}
		}
	},

	get : function ()
	{

		// branch for native XMLHttpRequest object
		if (window.XMLHttpRequest) {
			this.reqObj= new XMLHttpRequest();
			this.reqObj.onreadystatechange = this.processReqChange;
			this.reqObj.open('GET', this.requestURL + '?' + this.sendData, true);
			this.reqObj.setRequestHeader('Content-Type', 'application/x-www-form-URLencoded');
			this.reqObj.send(this.sendData);
		// branch for IE/Windows ActiveX version
		} else if (window.ActiveXObject) {
			this.reqObj = new ActiveXObject('Microsoft.XMLHTTP')
			if (this.req) {
				this.reqObj.onreadystatechange = this.processReqChange;
				this.reqObj.open('GET', this.requestURL + '?' + this.sendData, true);
				this.reqObj.setRequestHeader('Content-Type', 'application/x-www-form-URLencoded');
				this.reqObj.send(this.sendData);
			}
		}
	},

	processReqChange : function () {
		// only if req shows 'loaded'
		if (objAjax.reqObj.readyState == 4) {
			// only if 'OK'
			if (objAjax.reqObj.status == 200) {
				objAjax.returnFunction(objAjax.reqObj.responseXML);
			} else {
				alert('There was a problem retrieving the XML data:\n' + objAjax.reqObj.responseText);
			}
		}
	},

	returnFunction : function(returned){
		this.loadXML(returned);
		
		eval(objAjax.callbackFunction);
	},

	isdefined : function (variable)
	{
		return eval('(typeof('+variable+') != "undefined");');
	},

	loadXML : function(returned) {
		this.xmlData = returned.documentElement;
	},

	setReturnFunction : function (functionName, params){
		if(eval(typeof(params) != "undefined")) {

			if(typeof(params) == "number"){
				params = params+'';
			}

			if(typeof(params) == "string"){
				this.callbackFunction = functionName + "(" + params + ")";
			} else if( typeof(params) == "object") {
				this.objCallback = params;
				this.callbackFunction = functionName + "(this.objCallback)";
			} else {
				if(params.length > 0){
					var i = 0;
					var strParams = '';
					for(i=0;i<params.length;i++){
						strParams = strParams + "'" + params[i] + "'";
						if(i < (params.length-1)){
							strParams = strParams + ',';
						}
					}
					this.callbackFunction = functionName + "(" + strParams + ")";
				}else{
					this.callbackFunction = functionName + "()";
				}
			}
		}else{
			this.callbackFunction = functionName + "()";
		}

		

	},

	getXMLData : function (name){
		if(this.isdefined('this.xmlData')){
			if(this.xmlData.getElementsByTagName(name).length > 0){
				this.xmlData.getElementsByTagName(name)[0].normalize();
				return this.xmlData.getElementsByTagName(name)[0].firstChild.data;
			}else {
				return '';
			}
		}else{
			return '';
		}
	}

};