start_form() will return a <FORM> tag with the optional method, action and form encoding that you specify. The defaults are: 

    method: POST
    action: this script
    enctype: application/x-www-form-urlencoded


##</code><code>##

method = get|post [CI] 
This attribute specifies which HTTP method will be used to submit the form data set. Possible (case-insensitive) values are "get" (the default) and "post". See the section on form submission for usage information.