Void associateTextAndInput(ElementTree block, Int startpos, Int endpos, ElementTree control)
block: The element containing the text
startpos: The character position of the first character
endpos: The character position of the last character
control: The form control
Associates text with a form control. In some common graphical browsers, clicking on the text will then focus or activate the form control, which is especially useful for checkboxes and radio buttons. The related functions below all add form controls which are already associated with their label texts, and so this function is not needed for these.