How to add Lead automatically to campaign capturing from Web?

How to add Lead automatically to campaign capurted from Web?

Step 1:-
Create Web-to-Lead form under YourName-->setup-->Customize-->Leads-->Web-to-Lead
Then click Create Web-to-Lead form

Step 2:-
Include the fields, which you want to add in the web form
Then Click Generate
Now HTML code is generated.

Step 3:-
In the HTML code just add these two line

<input type="hidden"  id="Campaign_ID" name="Campaign_ID" value="<Specify the salesforce Id of the campaign>" /><br>

<input type="hidden"  id="member_status" name="member_status" value="true" /><br>


Step 4:-
Now click save and include in your web page

Now we are done.
All the leads captured from the web-to-Lead form are automatically assigned to the campaign which we specified.