Many web controls have an optional advanced properties configuration step in the wizard, including:
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The Tab Index lets you specify the relative tab position of the current web control. A GUI step will typically contain multiple web controls, and you can influence the relative tab position of the each web control. The control with the least index will be the first highlighted control. When the end-user clicks the Tab button, the web control with the next lowest tab index will become active.
When using cascading style sheets to decorate the controls on a user interface, you can configure the web control with a CSS class. At runtime, the web control will be rendered with the specified CSS class, and the appropriate CSS will influence the look and feel of the web control.
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Instead of defining all the CSS in one location, it is sometimes desirable to specify the CSS inline with the web control. This advanced property enables the specification of the inline CSS.
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The ID attribute is used to provide programmatic client-side access to a web control using javascript. It can also be used to selectively apply CSS styles to a control using selectors.