Summary of the implementation code of javascript cookie operations

Method 1: cookie operation class, code encapsulated. The following methods are also available for your reference.
Copy codeThe 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 codeThe Code is as follows:
Function setCookie (name, value) // set JS for cookies
{
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 codeThe Code is as follows:
If (getCookie ("yxjok ")! = "OK "){
// Determine whether the yxjok value in the cookie is OK. If not, the following advertisement is displayed.
Document. write ('<div id = "jb51_yxj"> <a href = "http://www.jb51.net" onclick = "Closeyxj ()" target = "_ blank"> /> </A> </div> ');
}
Function Closeyxj (){
// Close the reality of advertising. 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) // mainly modifies the cookie expiration time, which is several minutes.
{
Var argv = setADCookie. arguments;
Var argc = setADCookie. arguments. length;
Var expires = (argc> 2 )? Argv [2]: null;
If (expires! = Null)
{
Var LargeExpDate = new Date ();
LargeExpDate. setTime (LargeExpDate. getTime () + (expires * 1000*300 ));
}
Document. cookie = name + "=" + escape (value) + (expires = null )? "": ("; Expires =" + LargeExpDate. toGMTString ()));
}