Screenshot:


The example below illustrates the way to REMOVE any given row in a table in visualforce and ADD new rows.

The REMOVE button only removes the contact from the UI.
The REMOVED rows are deleted from the database when the "SAVE Changes" button is clicked.

To execute this example include a valid Account ID in the URL as below

https://na5.salesforce.com/apex/deleteRowsExample?id=0017000000UIvsg

VF PAGE: deleteRowsExample

Apex Controller: deleteRowsExample

The Profile Page of Salesforce Chatter can be customized to add additional TAB's. Here are the steps to do it. WEB TAB's and Visualforce TAB's can be added to the Profile page allowing to embed visualforce pages into the standard chatter profile page. Standard TAB's cannot be added.

STEP 1:

Navigate to Setup -> Create -> Apps


STEP 2:

Edit the 'Profile (Self)' and select the TAB's to add. In this case you can see that I have added the 'iSalesforce' TAB.

 

STEP 3:

This is the way it displays finally.

This article is a simple explanation of the use of the Site.Login() Apex method. The documentation in detail from Salesforce is here http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_classes_sites.htm.

STEP 1:
Enable Communities by going to the below path, Your Name -> Setup ->  App Setup -> Customize -> Communities -> Settings




STEP 2:
Create a new Community as shown below



STEP 3:
Create a Apex Class as shown below


Note: Replace 'null' with the URL to be redirected to after login.

STEP 4:

Create a Visualforce page 'CustomLoginPage' as shown below



STEP 5:
Navigate to Manage Communities from the setup menu, and click the 'Force.com' link as below



STEP 6:

Make the following changes as shown below.

STEP 7:

Modify the Apex Class 'CommunitiesLoginController' as below



STEP 8:

Modify the Visualforce page 'CommunitiesLogin' as below



STEP 9:

Make sure you publish the community. Navigate to the URL and you should see the custom login page as below.