trunk/public_html/meteor.js

// Set domain at highest level
var domainparts = document.domain.split(".");
document.domain = domainparts[domainparts.length-2]+"."+domainparts[domainparts.length-1];

Function.prototype.bind = function(obj) {
        var method = this,
        temp = function() {
                return method.apply(obj, arguments);
        };
        return temp;
}
Function.prototype.andThen=function(g) {
        var f=this;
        var a=this.arguments
        return function(args) {
                f(a);g(args);
        }
};

function Meteor(instID) {

        this.lastmsgreceived = -1;
        this.transferDoc = false;
        this.pingtimer = false;
        this.updatepollfreqtimer = false;
        this.lastrequest = 0;
        this.recvtimes = new Array();
        this.MHostId = false;
        this.callback_process = function() {};
        this.callback_reset = function() {};
        this.callback_eof = function() {};
        this.callback_changemode = function() {};
        this.callback_statuschanged = function() {};
        this.persist = true;
        this.frameloadtimer = false;
        this.frameurl = false;

        // Documented public properties
        this.channel = false;
        this.subdomain = "data";
        this.dynamicpageaddress = "push";
        this.backtrack = 0;
        this.smartpoll = true;
        this.pollfreq = 2000;
        this.minpollfreq = 2000;
        this.mode = "stream";
        this.polltimeout=30000;
        this.maxmessages=0;
        this.pingtimeout = 10000;
        this.status = 0;

        /* Statuses:    0 = Uninitialised,
                                        1 = Loading stream,
                                        2 = Loading controller frame,
                                        3 = Controller frame timeout, retrying every 5 seconds
                                        4 = Controller frame loaded and ready
                                        5 = Receiving data
        */

        // Set or retrieve host id.  Cookie takes this form:
        // MeteorID=123:6356353/124:098320454;
        var MeteIds = Meteor.readCookie("MeteorID");
        var regex1 = new RegExp("^([0-9\:\/M]+\/)*"+instID+"\:([^\/]+)(\/[0-9\:\/M]+)*$");
        var regex2 = new RegExp("^([0-9\:\/M]+\/)*M\:([^\/]+)(\/[0-9\:\/M]+)*$");
        if (typeof(instID) == "Number" && regex1.exec(MeteIds)) {
                this.MHostId = ma[2];
        } else if (typeof(instID) == "Number") {
                this.MHostId = Math.floor(Math.random()*1000000);
                var newcookie = (MeteIds)?MeteIds+"/":"";
                newcookie += instID+":"+this.MHostId;
                Meteor.createCookie("MeteorID", newcookie);
        } else if (ma = regex2.exec(MeteIds)) {
                this.MHostId = ma[2];
        } else {
                this.MHostId = Math.floor(Math.random()*1000000);
                var newcookie = (MeteIds)?MeteIds+"/":"";
                newcookie += "M:"+this.MHostId;
                Meteor.createCookie("MeteorID", newcookie);
        }
        this.instID = (typeof(instID) != "undefined") ? instID : 0;
}

Meteor.instances = new Array();
Meteor.servertimeoffset = 0;

Meteor.create = function(instID) {
        if (!instID) instID = 0;
        Meteor.instances[instID] = new Meteor(instID);
        return Meteor.instances[instID];
}

Meteor.register = function(ifr) {
        instid = new String(ifr.window.frameElement.id);
        instid = instid.replace("meteorframe_", "");
        ifr.p = this.instances[instid].process.bind(this.instances[instid]);
        ifr.r = this.instances[instid].reset.bind(this.instances[instid]);
        ifr.eof = this.instances[instid].eof.bind(this.instances[instid]);
        ifr.get = this.instances[instid].get.bind(this.instances[instid]);
        ifr.increasepolldelay = this.instances[instid].increasepolldelay.bind(this.instances[instid]);
        clearTimeout(this.instances[instid].frameloadtimer);
        this.instances[instid].setstatus(4);
}

Meteor.setServerTime = function(timestamp) {
        var now = new Date();
        var clienttime = (now.getTime() / 1000);
        Meteor.servertimeoffset = timestamp - clienttime;
}

Meteor.prototype.start = function() {
        this.persist = (this.maxmessages)?1:0;
        this.smartpoll = (this.smartpoll)?1:0;
        this.mode = (this.mode=="stream")?"stream":"poll";
        if (!this.subdomain || !this.channel) throw "Channel or Meteor subdomain host not specified";
        var now = new Date();
        var t = now.getTime();
        if (typeof(this.transferDoc)=="object") {
                this.transferDoc.open();
                this.transferDoc.close();
                delete this.transferDoc;
        }
        if (document.getElementById("meteorframe_"+this.instID)) {
                document.body.removeChild(document.getElementById("meteorframe_"+this.instID));
        }
        if (this.mode=="stream") {
                if (document.all) {
                        this.setstatus(1);
                        this.transferDoc = new ActiveXObject("htmlfile");
                        this.transferDoc.open();
                        this.transferDoc.write("<html>");
                        this.transferDoc.write("<script>document.domain=\""+(document.domain)+"\";</"+"script>");
                        this.transferDoc.write("</html>");
                        var selfref = this;
                        this.transferDoc.parentWindow.Meteor = Meteor;
                        this.transferDoc.close();
                        var ifrDiv = this.transferDoc.createElement("div");
                        this.transferDoc.appendChild(ifrDiv);
                        var url = "http://"+this.subdomain+"."+location.hostname+"/"+this.dynamicpageaddress+"?channel="+this.channel+"&id="+this.MHostId;
                        if (this.lastmsgreceived >= 0) {
                                url += "&restartfrom="+this.lastmsgreceived;
                        } else if (this.backtrack > 0) {
                                url += "&backtrack="+this.backtrack;
                        } else if (this.backtrack < 0 || isNaN(this.backtrack)) {
                                url += "&restartfrom=";
                        }
                        ifrDiv.innerHTML = "<iframe id=\"meteorframe_"+this.instID+"\" src=\""+url+"&nocache="+t+"\" style=\"display: none;\"></iframe>";
                } else {
                        var ifr = document.createElement("IFRAME");
                        ifr.style.width = "10px";
                        ifr.style.height = "10px";
                        ifr.style.border = "none";
                        ifr.style.position = "absolute";
                        ifr.style.top = "-10px";
                        ifr.style.marginTop = "-10px";
                        ifr.style.zIndex = "-20";
                        ifr.id = "meteorframe_"+this.instID;
                        document.body.appendChild(ifr);
                        this.frameurl = "http://"+this.subdomain+"."+location.hostname+"/stream.html";
                        this.frameload();
                }
                var f = this.pollmode.bind(this);
                clearTimeout(this.pingtimer);
                this.pingtimer = setTimeout(f, this.pingtimeout);

        } else {
                var ifr = document.createElement("IFRAME");
                ifr.style.width = "10px";
                ifr.style.height = "10px";
                ifr.style.border = "none";
                if (document.all) {
                        ifr.style.display = "none";
                } else {
                        ifr.style.position = "absolute";
                        ifr.style.marginTop = "-10px";
                        ifr.style.zIndex = "-20";
                }
                ifr.id = "meteorframe_"+this.instID;
                document.body.appendChild(ifr);
                this.frameurl = "http://"+this.subdomain+"."+location.hostname+"/poll.html";
                this.frameload();
                this.recvtimes[0] = t;
                if (this.updatepollfreqtimer) clearTimeout(this.updatepollfreqtimer);
                this.updatepollfreqtimer = setInterval(this.updatepollfreq.bind(this), 2500);
        }
        this.lastrequest = t;
}

Meteor.prototype.pollmode = function() {
        this.mode="poll";
        this.start();
        this.callback_changemode("poll");
        this.lastpingtime = false;
}

Meteor.prototype.process = function(id, data) {
        if (id > this.lastmsgreceived) {
                this.callback_process(data);
                if (id != -1) this.lastmsgreceived = id;
                if (this.mode=="poll") {
                        var now = new Date();
                        var t = now.getTime();
                        this.recvtimes[this.recvtimes.length] = t;
                        while (this.recvtimes.length > 5) this.recvtimes.shift();
                }
        } else if (id == -1) {
                this.ping();
        }
        this.setstatus(5);
}

Meteor.prototype.ping = function() {
        if (this.mode=="stream" && this.pingtimer) {
                clearTimeout(this.pingtimer);
                var f = this.pollmode.bind(this);
                this.pingtimer = setTimeout(f, this.pingtimeout);
                var now = new Date();
                this.lastpingtime = now.getTime();
        }
        this.setstatus(5);
}

Meteor.prototype.reset = function() {
        var now = new Date();
        var t = now.getTime();
        var x = this.pollfreq - (t-this.lastrequest);
        if (x < 10) x = 10;
        this.ping();
        this.callback_reset();
        setTimeout(this.start.bind(this), x);
}

Meteor.prototype.eof = function() {
        this.callback_eof();
}

Meteor.prototype.get = function(varname) {
        eval("var a = this."+varname+";");
        if (typeof(a) == "undefined") throw "Cannot get value of "+varname;
        return a;
}

Meteor.prototype.increasepolldelay = function() {
        this.pollfreq *= 2;
}

Meteor.prototype.updatepollfreq = function() {
        if (this.smartpoll) {
                var now = new Date();
                var t = now.getTime();
                var avg = 0;
                for (var i=1; i<this.recvtimes.length; i++) {
                        var x = (this.recvtimes[i]-this.recvtimes[i-1]);
                        avg += (x>60000)? 60000 : x;
                }
                x = (t-this.recvtimes[this.recvtimes.length-1]);
                avg += (x>180000)? 180000 : x;
                avg /= this.recvtimes.length;
                if ((avg/3) < this.pollfreq && (avg/3) >= this.minpollfreq) this.pollfreq = Math.ceil(this.pollfreq*0.9);
                if ((avg/3) > this.pollfreq) this.pollfreq = Math.floor(this.pollfreq*1.05);
        }
}

Meteor.prototype.registerEventCallback = function(evt, funcRef) {
        if (evt=="process") {
                this.callback_process = (this.callback_process).andThen(funcRef);
        } else if (evt=="reset") {
                this.callback_reset = (this.callback_reset).andThen(funcRef);
        } else if (evt=="eof") {
                this.callback_eof = (this.callback_eof).andThen(funcRef);
        } else if (evt=="changemode") {
                this.callback_changemode = (this.callback_changemode).andThen(funcRef);
        } else if (evt=="changestatus") {
                this.callback_statuschanged = (this.callback_statuschanged).andThen(funcRef);
        }
}

Meteor.prototype.frameload = function() {
        this.setstatus(2);
        if (document.getElementById("meteorframe_"+this.instID)) {
                var f = this.frameloadtimeout.bind(this);
                this.frameloadtimer = setTimeout(f, 5000);
                document.getElementById("meteorframe_"+this.instID).src = "about:blank";
                setTimeout(this.doloadurl.bind(this), 100);
        }
}
Meteor.prototype.doloadurl = function() {
        var now = new Date();
        var t = now.getTime();
        document.getElementById("meteorframe_"+this.instID).src = this.frameurl+"?nocache="+t;
}
Meteor.prototype.frameloadtimeout = function() {
        if (this.frameloadtimer) clearTimeout(this.frameloadtimer);
        this.setstatus(3);
        this.frameload();
}
Meteor.prototype.setstatus = function(newstatus) {
        if (this.status != newstatus) {
                this.status = newstatus;
                this.callback_statuschanged(newstatus);
        }
}

Meteor.createCookie = function(name,value,days) {
        if (days) {
                var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
                var expires = "; expires="+date.toGMTString();
        }
        else var expires = "";
        document.cookie = name+"="+value+expires+"; path=/";
}

Meteor.readCookie = function(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
}

Meteor.eraseCookie = function(name) {
        createCookie(name,"",-1);
}
1	andrew.betts	6	// Set domain at highest level
2			var domainparts = document.domain.split(".");
3			document.domain = domainparts[domainparts.length-2]+"."+domainparts[domainparts.length-1];
4
5			Function.prototype.bind = function(obj) {
6			var method = this,
7			temp = function() {
8			return method.apply(obj, arguments);
9			};
10			return temp;
11			}
12			Function.prototype.andThen=function(g) {
13			var f=this;
14			var a=this.arguments
15			return function(args) {
16			f(a);g(args);
17			}
18			};
19
20			function Meteor(instID) {
21
22			this.lastmsgreceived = -1;
23			this.transferDoc = false;
24			this.pingtimer = false;
25			this.updatepollfreqtimer = false;
26			this.lastrequest = 0;
27			this.recvtimes = new Array();
28			this.MHostId = false;
29			this.callback_process = function() {};
30			this.callback_reset = function() {};
31			this.callback_eof = function() {};
32			this.callback_changemode = function() {};
33	andrew.betts	7	this.callback_statuschanged = function() {};
34	andrew.betts	6	this.persist = true;
35	andrew.betts	7	this.frameloadtimer = false;
36			this.frameurl = false;
37	andrew.betts	6
38			// Documented public properties
39			this.channel = false;
40			this.subdomain = "data";
41			this.dynamicpageaddress = "push";
42			this.backtrack = 0;
43			this.smartpoll = true;
44			this.pollfreq = 2000;
45			this.minpollfreq = 2000;
46			this.mode = "stream";
47			this.polltimeout=30000;
48			this.maxmessages=0;
49			this.pingtimeout = 10000;
50	andrew.betts	7	this.status = 0;
51	andrew.betts	6
52	andrew.betts	7	/* Statuses: 0 = Uninitialised,
53			1 = Loading stream,
54			2 = Loading controller frame,
55			3 = Controller frame timeout, retrying every 5 seconds
56			4 = Controller frame loaded and ready
57			5 = Receiving data
58			*/
59
60	andrew.betts	6	// Set or retrieve host id. Cookie takes this form:
61			// MeteorID=123:6356353/124:098320454;
62			var MeteIds = Meteor.readCookie("MeteorID");
63			var regex1 = new RegExp("^([0-9\:\/M]+\/)"+instID+"\:([^\/]+)(\/[0-9\:\/M]+)$");
64			var regex2 = new RegExp("^([0-9\:\/M]+\/)M\:([^\/]+)(\/[0-9\:\/M]+)$");
65			if (typeof(instID) == "Number" && regex1.exec(MeteIds)) {
66			this.MHostId = ma[2];
67			} else if (typeof(instID) == "Number") {
68			this.MHostId = Math.floor(Math.random()*1000000);
69			var newcookie = (MeteIds)?MeteIds+"/":"";
70			newcookie += instID+":"+this.MHostId;
71			Meteor.createCookie("MeteorID", newcookie);
72			} else if (ma = regex2.exec(MeteIds)) {
73			this.MHostId = ma[2];
74			} else {
75			this.MHostId = Math.floor(Math.random()*1000000);
76			var newcookie = (MeteIds)?MeteIds+"/":"";
77			newcookie += "M:"+this.MHostId;
78			Meteor.createCookie("MeteorID", newcookie);
79			}
80			this.instID = (typeof(instID) != "undefined") ? instID : 0;
81			}
82
83			Meteor.instances = new Array();
84			Meteor.servertimeoffset = 0;
85
86			Meteor.create = function(instID) {
87			if (!instID) instID = 0;
88			Meteor.instances[instID] = new Meteor(instID);
89			return Meteor.instances[instID];
90			}
91
92			Meteor.register = function(ifr) {
93			instid = new String(ifr.window.frameElement.id);
94			instid = instid.replace("meteorframe_", "");
95			ifr.p = this.instances[instid].process.bind(this.instances[instid]);
96			ifr.r = this.instances[instid].reset.bind(this.instances[instid]);
97			ifr.eof = this.instances[instid].eof.bind(this.instances[instid]);
98			ifr.get = this.instances[instid].get.bind(this.instances[instid]);
99			ifr.increasepolldelay = this.instances[instid].increasepolldelay.bind(this.instances[instid]);
100	andrew.betts	7	clearTimeout(this.instances[instid].frameloadtimer);
101			this.instances[instid].setstatus(4);
102	andrew.betts	6	}
103
104			Meteor.setServerTime = function(timestamp) {
105			var now = new Date();
106			var clienttime = (now.getTime() / 1000);
107			Meteor.servertimeoffset = timestamp - clienttime;
108			}
109
110			Meteor.prototype.start = function() {
111			this.persist = (this.maxmessages)?1:0;
112			this.smartpoll = (this.smartpoll)?1:0;
113			this.mode = (this.mode=="stream")?"stream":"poll";
114			if (!this.subdomain \|\| !this.channel) throw "Channel or Meteor subdomain host not specified";
115			var now = new Date();
116			var t = now.getTime();
117			if (typeof(this.transferDoc)=="object") {
118			this.transferDoc.open();
119			this.transferDoc.close();
120			delete this.transferDoc;
121			}
122			if (document.getElementById("meteorframe_"+this.instID)) {
123			document.body.removeChild(document.getElementById("meteorframe_"+this.instID));
124			}
125			if (this.mode=="stream") {
126			if (document.all) {
127	andrew.betts	7	this.setstatus(1);
128	andrew.betts	6	this.transferDoc = new ActiveXObject("htmlfile");
129			this.transferDoc.open();
130			this.transferDoc.write("<html>");
131			this.transferDoc.write("<script>document.domain=\""+(document.domain)+"\";</"+"script>");
132			this.transferDoc.write("</html>");
133			var selfref = this;
134			this.transferDoc.parentWindow.Meteor = Meteor;
135			this.transferDoc.close();
136			var ifrDiv = this.transferDoc.createElement("div");
137			this.transferDoc.appendChild(ifrDiv);
138			var url = "http://"+this.subdomain+"."+location.hostname+"/"+this.dynamicpageaddress+"?channel="+this.channel+"&id="+this.MHostId;
139			if (this.lastmsgreceived >= 0) {
140			url += "&restartfrom="+this.lastmsgreceived;
141			} else if (this.backtrack > 0) {
142			url += "&backtrack="+this.backtrack;
143			} else if (this.backtrack < 0 \|\| isNaN(this.backtrack)) {
144			url += "&restartfrom=";
145			}
146			ifrDiv.innerHTML = "<iframe id=\"meteorframe_"+this.instID+"\" src=\""+url+"&nocache="+t+"\" style=\"display: none;\"></iframe>";
147			} else {
148			var ifr = document.createElement("IFRAME");
149			ifr.style.width = "10px";
150			ifr.style.height = "10px";
151			ifr.style.border = "none";
152			ifr.style.position = "absolute";
153			ifr.style.top = "-10px";
154			ifr.style.marginTop = "-10px";
155			ifr.style.zIndex = "-20";
156			ifr.id = "meteorframe_"+this.instID;
157			document.body.appendChild(ifr);
158	andrew.betts	7	this.frameurl = "http://"+this.subdomain+"."+location.hostname+"/stream.html";
159			this.frameload();
160	andrew.betts	6	}
161			var f = this.pollmode.bind(this);
162			clearTimeout(this.pingtimer);
163			this.pingtimer = setTimeout(f, this.pingtimeout);
164
165			} else {
166			var ifr = document.createElement("IFRAME");
167			ifr.style.width = "10px";
168			ifr.style.height = "10px";
169			ifr.style.border = "none";
170			if (document.all) {
171			ifr.style.display = "none";
172			} else {
173			ifr.style.position = "absolute";
174			ifr.style.marginTop = "-10px";
175			ifr.style.zIndex = "-20";
176			}
177			ifr.id = "meteorframe_"+this.instID;
178			document.body.appendChild(ifr);
179	andrew.betts	7	this.frameurl = "http://"+this.subdomain+"."+location.hostname+"/poll.html";
180			this.frameload();
181	andrew.betts	6	this.recvtimes[0] = t;
182			if (this.updatepollfreqtimer) clearTimeout(this.updatepollfreqtimer);
183			this.updatepollfreqtimer = setInterval(this.updatepollfreq.bind(this), 2500);
184			}
185			this.lastrequest = t;
186			}
187
188			Meteor.prototype.pollmode = function() {
189			this.mode="poll";
190			this.start();
191			this.callback_changemode("poll");
192	andrew.betts	7	this.lastpingtime = false;
193	andrew.betts	6	}
194
195			Meteor.prototype.process = function(id, data) {
196			if (id > this.lastmsgreceived) {
197			this.callback_process(data);
198			if (id != -1) this.lastmsgreceived = id;
199			if (this.mode=="poll") {
200			var now = new Date();
201			var t = now.getTime();
202			this.recvtimes[this.recvtimes.length] = t;
203			while (this.recvtimes.length > 5) this.recvtimes.shift();
204			}
205			} else if (id == -1) {
206			this.ping();
207			}
208	andrew.betts	7	this.setstatus(5);
209	andrew.betts	6	}
210
211			Meteor.prototype.ping = function() {
212			if (this.mode=="stream" && this.pingtimer) {
213			clearTimeout(this.pingtimer);
214			var f = this.pollmode.bind(this);
215			this.pingtimer = setTimeout(f, this.pingtimeout);
216			var now = new Date();
217			this.lastpingtime = now.getTime();
218			}
219	andrew.betts	7	this.setstatus(5);
220	andrew.betts	6	}
221
222			Meteor.prototype.reset = function() {
223			var now = new Date();
224			var t = now.getTime();
225			var x = this.pollfreq - (t-this.lastrequest);
226			if (x < 10) x = 10;
227			this.ping();
228			this.callback_reset();
229			setTimeout(this.start.bind(this), x);
230			}
231
232			Meteor.prototype.eof = function() {
233			this.callback_eof();
234			}
235
236			Meteor.prototype.get = function(varname) {
237			eval("var a = this."+varname+";");
238			if (typeof(a) == "undefined") throw "Cannot get value of "+varname;
239			return a;
240			}
241
242			Meteor.prototype.increasepolldelay = function() {
243			this.pollfreq *= 2;
244			}
245
246			Meteor.prototype.updatepollfreq = function() {
247			if (this.smartpoll) {
248			var now = new Date();
249			var t = now.getTime();
250			var avg = 0;
251			for (var i=1; i<this.recvtimes.length; i++) {
252			var x = (this.recvtimes[i]-this.recvtimes[i-1]);
253			avg += (x>60000)? 60000 : x;
254			}
255			x = (t-this.recvtimes[this.recvtimes.length-1]);
256			avg += (x>180000)? 180000 : x;
257			avg /= this.recvtimes.length;
258			if ((avg/3) < this.pollfreq && (avg/3) >= this.minpollfreq) this.pollfreq = Math.ceil(this.pollfreq*0.9);
259			if ((avg/3) > this.pollfreq) this.pollfreq = Math.floor(this.pollfreq*1.05);
260			}
261			}
262
263			Meteor.prototype.registerEventCallback = function(evt, funcRef) {
264			if (evt=="process") {
265			this.callback_process = (this.callback_process).andThen(funcRef);
266			} else if (evt=="reset") {
267			this.callback_reset = (this.callback_reset).andThen(funcRef);
268			} else if (evt=="eof") {
269			this.callback_eof = (this.callback_eof).andThen(funcRef);
270			} else if (evt=="changemode") {
271			this.callback_changemode = (this.callback_changemode).andThen(funcRef);
272	andrew.betts	7	} else if (evt=="changestatus") {
273			this.callback_statuschanged = (this.callback_statuschanged).andThen(funcRef);
274	andrew.betts	6	}
275			}
276
277	andrew.betts	7	Meteor.prototype.frameload = function() {
278			this.setstatus(2);
279			if (document.getElementById("meteorframe_"+this.instID)) {
280			var f = this.frameloadtimeout.bind(this);
281			this.frameloadtimer = setTimeout(f, 5000);
282			document.getElementById("meteorframe_"+this.instID).src = "about:blank";
283			setTimeout(this.doloadurl.bind(this), 100);
284			}
285			}
286			Meteor.prototype.doloadurl = function() {
287			var now = new Date();
288			var t = now.getTime();
289			document.getElementById("meteorframe_"+this.instID).src = this.frameurl+"?nocache="+t;
290			}
291			Meteor.prototype.frameloadtimeout = function() {
292			if (this.frameloadtimer) clearTimeout(this.frameloadtimer);
293			this.setstatus(3);
294			this.frameload();
295			}
296			Meteor.prototype.setstatus = function(newstatus) {
297			if (this.status != newstatus) {
298			this.status = newstatus;
299			this.callback_statuschanged(newstatus);
300			}
301			}
302	andrew.betts	6
303			Meteor.createCookie = function(name,value,days) {
304			if (days) {
305			var date = new Date();
306			date.setTime(date.getTime()+(days2460601000));
307			var expires = "; expires="+date.toGMTString();
308			}
309			else var expires = "";
310			document.cookie = name+"="+value+expires+"; path=/";
311			}
312
313			Meteor.readCookie = function(name) {
314			var nameEQ = name + "=";
315			var ca = document.cookie.split(';');
316			for(var i=0;i < ca.length;i++) {
317			var c = ca[i];
318			while (c.charAt(0)==' ') c = c.substring(1,c.length);
319			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
320			}
321			return null;
322			}
323
324			Meteor.eraseCookie = function(name) {
325			createCookie(name,"",-1);
326	andrew.betts	3	}