https://stkarenshighschool.com/ScriptResource.axd?d=unHka9MWFHtWpm…tEZ_z8VfMuXKSsoK_4FB_FhtMWo4pbs1&t=5f6a2d32

1// (c) Copyright Microsoft Corporation.
2// This source is subject to the Microsoft Public License.
3// See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
4// All other rights reserved.
5
6
7/// <reference name="MicrosoftAjax.debug.js" />
8/// <reference name="MicrosoftAjaxTimer.debug.js" />
9/// <reference name="MicrosoftAjaxWebForms.debug.js" />
10
11
12///////////////////////////////////////////////////////////////////////////////
13// Sys.Timer
14
15Sys.Timer = function() {
16    Sys.Timer.initializeBase(this);
17    
18    this._interval = 1000;
19    this._enabled = false;
20    this._timer = null;
21}
22
23Sys.Timer.prototype = {
24    get_interval: function() {
25        
26        return this._interval;
27    },
28    set_interval: function(value) {
29        
30        if (this._interval !== value) {
31            this._interval = value;
32            this.raisePropertyChanged('interval');
33            
34            if (!this.get_isUpdating() && (this._timer !== null)) {
35                this._stopTimer();
36                this._startTimer();
37            }
38        }
39    },
40    
41    get_enabled: function() {
42        
43        return this._enabled;
44    },
45    set_enabled: function(value) {
46        
47        if (value !== this.get_enabled()) {
48            this._enabled = value;
49            this.raisePropertyChanged('enabled');
50            if (!this.get_isUpdating()) {
51                if (value) {
52                    this._startTimer();
53                }
54                else {
55                    this._stopTimer();
56                }
57            }
58        }
59    },
60
61    
62    add_tick: function(handler) {
63        
64        
65        this.get_events().addHandler("tick", handler);
66    },
67
68    remove_tick: function(handler) {
69        
70        
71        this.get_events().removeHandler("tick", handler);
72    },
73
74    dispose: function() {
75        this.set_enabled(false);
76        this._stopTimer();
77        
78        Sys.Timer.callBaseMethod(this, 'dispose');
79    },
80    
81    updated: function() {
82        Sys.Timer.callBaseMethod(this, 'updated');
83
84        if (this._enabled) {
85            this._stopTimer();
86            this._startTimer();
87        }
88    },
89
90    _timerCallback: function() {
91        var handler = this.get_events().getHandler("tick");
92        if (handler) {
93            handler(this, Sys.EventArgs.Empty);
94        }
95    },
96
97    _startTimer: function() {
98        this._timer = window.setInterval(Function.createDelegate(this, this._timerCallback), this._interval);
99    },
100
101    _stopTimer: function() {
102        window.clearInterval(this._timer);
103        this._timer = null;
104    }
105}
106
107Sys.Timer.descriptor = {
108    properties: [   {name: 'interval', type: Number},
109                    {name: 'enabled', type: Boolean} ],
110    events: [ {name: 'tick'} ]
111}
112
113Sys.Timer.registerClass('Sys.Timer', Sys.Component);