Using cookies to save user names and record logon statuses, how can we determine whether the user's cookie exists? There is a good method below. You can refer to the following: Sometimes we need to use cookies to save the user name and record the login status. How can we correctly determine whether the user cookie exists? You cannot simply use! =.
The Code is as follows:
A = getCookie ("username3 ");
C_start = document. cookie. indexOf ("username3 = ");
If (c_start =-1 ){
$ ("# Login_form"). show ();
$ ("# Logined"). hide ();
}
Else {
$ ("# Login_form"). hide ();
$ ("# Logined"). show ();
$ ("# Ustr" pai.html ();
}
The correct method is to determine whether a cookie named username3 exists and use document. cookie. indexOf ("username3 =") to determine whether the cookie exists. If the returned value is-1, it indicates that the cookie does not exist.
