Summary of the implementation code of JavaScript cookie operations

Method 1: Cookie operations,CodeEncapsulation. The following methods are also available for your reference. Copy code The Code is as follows: String. Prototype. Trim = function ()
{
Return this. Replace (/^ \ s +/g, ""). Replace (/\ s + $/g ,"");
}
Function jscookie ()
{
This. getcookie = function (key)
{
VaR cookie = Document. Cookie;
VaR cookiearray = cookie. Split (';');
VaR getvalue = "";
For (VAR I = 0; I <cookiearray. length; I ++)
{
If (cookiearray [I]. Trim (). substr (0, key. Length) = key)
{
Getvalue = cookiearray [I]. Trim (). substr (key. Length + 1 );
Break;
}
}
Return getvalue;
};
This. getchild = function (cookiekey, childkey)
{
VaR child = This. getcookie (cookiekey );
VaR Childs = Child. Split ('&');
VaR getvalue = "";
For (VAR I = 0; I <Childs. length; I ++)
{
If (Childs [I]. Trim (). substr (0, childkey. Length) = childkey)
{
Getvalue = Childs [I]. Trim (). substr (childkey. Length + 1 );
Break;
}
}
Return getvalue;
};
This. setcookie = function (Key, value, expire, domain, PATH)
{
VaR cookie = "";
If (key! = NULL & value! = NULL)
Cookie + = Key + "=" + value + ";";
If (expire! = NULL)
Cookie + = "expires =" + expire. togmtstring () + ";";
If (domain! = NULL)
Cookie + = "Domain =" + domain + ";";
If (path! = NULL)
Cookie + = "Path =" + path + ";";
Document. Cookie = cookie;
};
This. expire = function (key)
{
Expire_time = new date ();
Expire_time.setfullyear (expire_time.getfullyear ()-1 );
VaR cookie = "" + key + "= E; expires =" + expire_time + ";"
Document. Cookie = cookie;
}
}

Usage:
1. Set cookie
VaR cookie = new jscookie ();
// Normal settings
Cookie. setcookie ("key1", "val1 ");
// The expiration time is one year.
VaR expire_time = new date ();
Expire_time.setfullyear (expire_time.getfullyear () + 1 );
Cookie. setcookie ("key2", "val2", expire_time );
// Set the domain and path with the expiration time
Cookie. setcookie ("key3", "val3", expire_time, ".cnblogs.com ","/");
// Set the cookie of the BIND key. The subkeys are K1, K2, and K3.
Cookie. setcookie ("key4", "k1 = 1 & k2 = 2 & K3 = 3 ");
Ii. Reading cookies
// Simple retrieval
Cookie. getcookie ("key1 ");
Cookie. getcookie ("key2 ");
Cookie. getcookie ("key3 ");
Cookie. getcookie ("key4 ");
// Obtain the key 1 Value of key4
Cookie. getchild ("key4", "K1 ");
Iii. Delete
Cookie. expire ("key1 ");
Cookie. expire ("key2 ");
Cookie. expire ("key3 ");
Cookie. expire ("key4 ");
Method 2: cookie operation function, which is also used by the fool house. You can select as needed.
Copy code The Code is as follows: function setcookie (name, value) // cookies set JS
{
VaR argv = setcookie. arguments;
VaR argc = setcookie. Arguments. length;
VaR expires = (argc> 2 )? Argv [2]: NULL;
If (expires! = NULL)
{
VaR largeexpdate = new date ();
Largeexpdate. settime (largeexpdate. gettime () + (expires * 1000*3600*24 ));
}
Document. Cookie = Name + "=" + escape (value) + (expires = NULL )? "": ("; Expires =" + largeexpdate. togmtstring ()));
}

Function getcookie (name) // cookies read JS
{
VaR search = Name + "="
If (document. Cookie. length> 0)
{
Offset = Document. Cookie. indexof (Search)
If (offset! =-1)
{
Offset + = search. Length
End = Document. Cookie. indexof (";", offset)
If (END =-1) End = Document. Cookie. Length
Return Unescape (document. Cookie. substring (offset, end ))
}
Else return ""
}
}

usage: copy Code the code is as follows: if (getcookie (" yxjok ")! = "OK") {
// determines whether the yxjok value in the cookie is OK. If not, the following advertisement is displayed.
document. write ('

/>

');
}< br> function closeyxj () {
// the reality of closing an advertisement. The cookie record has already been used. The function here is mainly to disable the display for a period of time. The default value is 24 hours.
$ ("jb51_yxj "). style. display = 'none';
setcookie ("yxjok", "OK", 10);
}

function setadcookie (name, value) // modifies the cookie expiration time, which is several minutes.
{< br> var argv = setadcookie. arguments;
var argc = setadcookie. Arguments. length;
var expires = (argc> 2 )? Argv [2]: NULL;
If (expires! = NULL)
{< br> var largeexpdate = new date ();
largeexpdate. settime (largeexpdate. gettime () + (expires * 1000*300);
}< br> document. cookie = Name + "=" + escape (value) + (expires = NULL )? "": ("; Expires =" + largeexpdate. togmtstring ();
}