JS gets the url link string location.href_basic knowledge

js to obtain the url link string: location.href

can intercept it to obtain the transmitted parameters. Commonly used are as follows:

location.href.indexOf("?")--- ---Get? index value.

Note: The location.href here does not refer to the current address in the address bar, but the actual address of the page.

In addition, some digressions:

In C#, IndexOf is also used to obtain the index of the character position.

Getting the index in sqlserver is different:

The first one:

select * from dbo.users where CharIndex('2',mainsubjects)>0

The second method:
select * from dbo.users where patIndex('%2%',mainsubjects)>0

I use the judgment column to determine whether the advertisement should be displayed :

Only content in the http://www.jb51.net/codes/ directory will display ads:

Copy code The code is as follows:

if(location.href.indexOf("http://www.jb51.net/codes/")>-1){
alert('ok');
}