Several less common html Tag, you see there用得着place. 

  1. Label 

  Label Input elements are used to mark the presentation.    Label "For" Input elements and attributes to the id line.    Benefits: Click Tips text, automatically Focus on the corresponding input elements.    For Radio, Checkbox click region, particularly such a small component particularly useful: 

  Color: <br /> 
  <input Type="checkbox" name="color" id="color_r" value="red"> <label for="color_r"> red </ label> <br> 
  <input Type="checkbox" name="color" id="color_g" value="green"> <label for="color_g"> green </ label> <br> 
  <input Type="checkbox" name="color" id="color_b" value="blue"> <label for="color_x"> blue </ label> <br> <! - For if not, and ID match, click text is of no use -> 

  2. FieldSet & Legend 

  FieldSet to Clear to a group of Input controls as one group (the equivalent VB / VC inside Control Group), and Legend Group is the title (equivalent to the title of Group controls).    For example: 

  <fieldset Style="width:20%"> 
  <legend> Person </ legend> 
  <label For="name"> Name </ label> <input type="text" id="name" /> 
<fieldset>
  <legend> Gender </ legend> 
  <input Type="radio" name="gender" id="male" /> <label for="male"> Male </ label> <br> 
  <input Type="radio" name="gender" id="female" /> <label for="female"> Female </ label> 
  </ Fieldset> 
  </ Fieldset> 

  3. Optgroup 

  Select the option for the group inside.    For example: 

  <select Name="age"> 
  <optgroup Label="baby"> 
  <option> 0-2 </ option> 
  <option> 3-5 </ option> 
  </ Optgroup> 
  <optgroup Label="kid"> 
  <option> 6-10 </ option> 
  <option> 10-15 </ option> 
  </ Optgroup> 
  <optgroup Label="adult"> 
  <option> 16-30 </ option> 
  <option> 31-40 </ option> 
  <option> 41-60 </ option> 
  </ Optgroup> 
  </ Select> 

  Note: The above code can be directly copied to generate a html document operation, testing results.