Add form tags automatically around form fields
To group related HTML form controls, such as text boxes, check boxes, and submit buttons, you can put the form controls inside a single set of form tags (<form> </form>.) You can set Microsoft Expression Web to automatically add form tags around a form control when you add the form control to a location that is not already enclosed by form tags.
To automatically put form tags around HTML form controls
On the Tools menu, click Page Editor Options.
In the Page Editor Options dialog box, click the General tab.
Select Automatically enclose form fields within a form.