var Base64 = {
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
	encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
		input = Base64._utf8_encode(input);
		while (i < input.length) {
			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.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;
	},
	decode : function (input) {
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;
		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
		while (i < input.length) {
			enc1 = this._keyStr.indexOf(input.charAt(i++));
			enc2 = this._keyStr.indexOf(input.charAt(i++));
			enc3 = this._keyStr.indexOf(input.charAt(i++));
			enc4 = this._keyStr.indexOf(input.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;
	},
	_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;
	},
	_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;
	}
}

request = {
	xml : function(url,callback) {
		var tr = this.acquire();
		if (!tr) {
			setTimeout(function() { request.xml(url, callback); }, 100);
			return;
		}
		tr.handle.onreadystatechange = function() {
			if (tr.handle.readyState!=4) return;
			if (tr.handle.status!=200) return;
			if (callback && tr.handle.responseXML)
				callback(tr.handle.responseXML);
			request.release(tr.idx);
		}
		tr.handle.open("GET", this.randomize(url), true);
		tr.handle.send("");
		return tr.idx;
	},
	html : function(url,callback) {
		var tr = this.acquire();
		if (!tr) {
			setTimeout(function() { request.html(url, callback); }, 100);
			return;
		}
		tr.handle.onreadystatechange = function() {
			if (tr.handle.readyState!=4) return;
			if (tr.handle.status!=200) return;
			if (callback && tr.handle.responseText) {
				var str = tr.handle.responseText;
				var scripts = str.rplace("\r","").rplace("\n"," ").match(/<script type="text\/javascript">(.)*?<\/script>/mg);
				callback(str);
				if (scripts) {
					for (i=0; i<scripts.length; i++) {
						scripts[i] = scripts[i].rplace("<script type=\"text/javascript\">","").rplace("</"+"script>","");
						eval(scripts[i]);
					}
				}
			}
			request.release(tr.idx);
		}
		tr.handle.open("GET", this.randomize(url), true);
		tr.handle.send("");
		return tr.idx;
	},
	htmlnow : function(url) {
		var tr = this.acquire();
		tr.handle.onreadystatechange = function() { };
		tr.handle.open("GET", this.randomize(url), false);
		tr.handle.send("");
		if (tr.handle.readyState!=4) return "";
		if (tr.handle.status!=200) return "";
		var rs = tr.handle.responseText;
		request.release(tr.idx);
		return rs;
	},
	json : function(url,callback) {
		var tr = this.acquire();
		if (!tr) {
			setTimeout(function() { request.json(url, callback); }, 100);
			return;
		}
		tr.handle.onreadystatechange = function() {
			if (tr.handle.readyState!=4) return;
			if (tr.handle.status!=200) return;
			if (callback && tr.handle.responseText) {
				var rs = null;
				try {
					rs = eval("("+tr.handle.responseText+")");
				} catch (e) {
					alert("Error in server return:\n\n"+tr.handle.responseText);
					rs = null;
				}
				callback(rs);
			} else if (callback)
				callback({});
			request.release(tr.idx);
		}
		tr.handle.open("GET", this.randomize(url), true);
		tr.handle.send("");
		return tr.idx;
	},
	jsonnow : function(url) {
		var tr = this.acquire();
		tr.handle.onreadystatechange = function() { };
		tr.handle.open("GET", this.randomize(url), false);
		tr.handle.send("");
		if (tr.handle.readyState!=4) return { };
		if (tr.handle.status!=200) return { };
		var rs = { };
		if (tr.handle.responseText) {
			try {
				rs = eval("("+tr.handle.responseText+")");
			} catch (e) {
				alert("Error in server return:\n\n"+tr.handle.responseText);
				rs = { };
			}
		} else
			rs = { };
		request.release(tr.idx);
		return rs;
	},
	post : function(url,vars,callback) {
		var body = "";
		for (var a in vars)
			if (vars[a]!=null && typeof vars[a]!="function")
				body += (body?"&":"")+a+"="+vars[a];
		var tr = this.acquire();
		if (!tr) {
			setTimeout(function() { request.post(url, vars, callback); }, 100);
			return;
		}
		tr.handle.onreadystatechange = function() {
			if (tr.handle.readyState!=4) return;
			if (tr.handle.status!=200) return;
			if (callback && tr.handle.responseText) {
				var rs = null;
				try {
					rs = eval("("+tr.handle.responseText+")");
				} catch (e) {
					alert("Error in server return:\n\n"+tr.handle.responseText);
					rs = null;
				}
				callback(rs);
			}
			request.release(tr.idx);
		}
		tr.handle.open("POST", this.randomize(url), true);
		tr.handle.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
		tr.handle.send(body);
		return tr.idx
	},
	posthtml : function(url,vars,callback) {
		var body = "";
		for (var a in vars)
			if (vars[a]!=null && typeof vars[a]!="function")
				body += (body?"&":"")+a+"="+vars[a];
		var tr = this.acquire();
		if (!tr) {
			setTimeout(function() { request.post(url, vars, callback); }, 100);
			return;
		}
		tr.handle.onreadystatechange = function() {
			if (tr.handle.readyState!=4) return;
			if (tr.handle.status!=200) return;
			if (callback && tr.handle.responseText) {
				var str = tr.handle.responseText;
				var scripts = str.rplace("\r","").rplace("\n"," ").match(/<script type="text\/javascript">(.)*?<\/script>/mg);
				if (scripts)
					for (i=0; i<scripts.length; i++)
						scripts[i] = scripts[i].rplace("<script type=\"text/javascript\">","").rplace("</"+"script>","");
				callback(str);
				if (scripts) {
					for (i=0; i<scripts.length; i++) {
						eval(scripts[i]);
					}
				}
			}
			request.release(tr.idx);
		}
		tr.handle.open("POST", this.randomize(url), true);
		tr.handle.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
		tr.handle.send(body);
		return tr.idx;
	},
	randomize : function(url) {
		if (url.indexOf("?")>=0)
			url += "&"+Math.random();
		else
			url += "?"+Math.random();
		url = url.rplace("#", "%23");
		return url;
	},
	rqcache : [],
	rqfree : [],
	transport : function() {
		if( typeof XMLHttpRequest == "undefined" ) XMLHttpRequest = function() {
			try { return new ActiveXObject("Msxml2.XMLHTTP.6.0") } catch(e) {}
			try { return new ActiveXObject("Msxml2.XMLHTTP.3.0") } catch(e) {}
			try { return new ActiveXObject("Msxml2.XMLHTTP") } catch(e) {}
			try { return new ActiveXObject("Microsoft.XMLHTTP") } catch(e) {}
			throw new Error( "This browser does not support XMLHttpRequest." )
		};
		return new XMLHttpRequest();
	},
	acquire : function() {
		for (var i=0; i<this.rqcache.length; i++)
			if (this.rqfree[i]) {
				this.rqfree[i] = false;
				return { handle: this.rqcache[i], idx: i };
			}
		return null;
	},
	release : function(idx) {
		this.rqcache[idx].abort();
		this.rqcache[idx].onreadystatechange = function() { };
		this.rqfree[idx] = true;
	},
	envelope : function(str) {
		if (!str)
			return str;
		return Base64.encode(str).rplace("+","%2B");
	},
	deenvelope : function(str) {
		return Base64.decode(str);
	}
};

for (i=0; i<10; i++) {
	request.rqcache[i] = request.transport();
	request.rqfree[i] = true;
}