https://pbsz.ebank.cmbchina.com/CmbBank_GenShell/UI/Base/doc/Scripts/Cookie.js

1// The constructor function: creates a cookie object for the specified
2// document, with a specified name and optional attributes.
3// Arguments:
4//   document: The Document object that the cookie is stored for. Required.
5//   name:     A string that specifies a name for the cookie. Required.
6//   hours:    An optional number that specifies the number of hours from now
7//             that the cookie should expire.
8//   path:     An optional string that specifies the cookie path attribute.
9//   domain:   An optional string that specifies the cookie domain attribute.
10//   secure:   An optional Boolean value that, if true, requests a secure cookie.
11//
12function Cookie(document, name, hours, path, domain, secure)
13{
14    // All the predefined properties of this object begin with '$'
15    // to distinguish them from other properties which are the values to
16    // be stored in the cookie.
17    this.$document = document;
18    this.$name = name;
19    if (hours)
20        this.$expiration = new Date((new Date()).getTime() + hours*3600000);
21    else this.$expiration = null;
22    if (path) this.$path = path; else this.$path = null;
23    if (domain) this.$domain = domain; else this.$domain = null;
24    if (secure) this.$secure = true; else this.$secure = false;
25}
26
27// This function is the store() method of the Cookie object.
28function _Cookie_store()
29{
30    // First, loop through the properties of the Cookie object and
31    // put together the value of the cookie. Since cookies use the
32    // equals sign and semicolons as separators, we'll use colons
33    // and ampersands for the individual state variables we store 
34    // within a single cookie value. Note that we escape the value
35    // of each state variable, in case it contains punctuation or other
36    // illegal characters.
37    var cookieval = "";
38    for(var prop in this) {
39        // Ignore properties with names that begin with '$' and also methods.
40        if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function')) 
41            continue;
42        if (cookieval != "") cookieval += '&';
43        cookieval += prop + ':' + escape(this[prop]);
44    }
45
46    // Now that we have the value of the cookie, put together the 
47    // complete cookie string, which includes the name and the various
48    // attributes specified when the Cookie object was created.
49    var cookie = this.$name + '=' + cookieval;
50    if (this.$expiration)
51        cookie += '; expires=' + this.$expiration.toGMTString();
52    if (this.$path) cookie += '; path=' + this.$path;
53    if (this.$domain) cookie += '; domain=' + this.$domain;
54    if (this.$secure) cookie += '; secure';
55
56    // Now store the cookie by setting the magic Document.cookie property.
57    this.$document.cookie = cookie;
58}
59// This function is the load() method of the Cookie object.
60function _Cookie_load()
61{
62    // First, get a list of all cookies that pertain to this document.
63    // We do this by reading the magic Document.cookie property.
64    var allcookies = this.$document.cookie;
65    if (allcookies == "") return false;
66
67    // Now extract just the named cookie from that list.
68    var start = allcookies.indexOf(this.$name + '=');
69    if (start == -1) return false;   // Cookie not defined for this page.
70    start += this.$name.length + 1;  // Skip name and equals sign.
71    var end = allcookies.indexOf(';', start);
72    if (end == -1) end = allcookies.length;
73    var cookieval = allcookies.substring(start, end);
74
75    // Now that we've extracted the value of the named cookie, we've
76    // got to break that value down into individual state variable 
77    // names and values. The name/value pairs are separated from each
78    // other by ampersands, and the individual names and values are
79    // separated from each other by colons. We use the split method
80    // to parse everything.
81    var a = cookieval.split('&');    // Break it into array of name/value pairs.
82    for(var i=0; i < a.length; i++)  // Break each pair into an array.
83        a[i] = a[i].split(':');
84
85    // Now that we've parsed the cookie value, set all the names and values

86    // of the state variables in this Cookie object. Note that we unescape()
87    // the property value, because we called escape() when we stored it.
88    for(var i = 0; i < a.length; i++) {
89        this[a[i][0]] = unescape(a[i][1]);
90    }
91
92    // We're done, so return the success code.
93    return true;
94}
95
96// This function is the remove() method of the Cookie object.
97function _Cookie_remove()
98{
99    var cookie;
100    cookie = this.$name + '=';
101    if (this.$path) cookie += '; path=' + this.$path;
102    if (this.$domain) cookie += '; domain=' + this.$domain;
103    cookie += '; expires=Fri, 02-Jan-1970 00:00:00 GMT';
104
105    this.$document.cookie = cookie;
106}
107
108// Create a dummy Cookie object, so we can use the prototype object to make
109// the functions above into methods.
110new Cookie();
111Cookie.prototype.store = _Cookie_store;
112Cookie.prototype.load = _Cookie_load;
113Cookie.prototype.remove = _Cookie_remove;
114
115