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console 命令行工具 X clear

                    
>
console
<!DOCTYPE html>
<html>
<body>

<form action="action_page.php">
<fieldset>
<legend>Information:</legend>
Firstname:
<br/>
<input type="text" value="zhangsan">
  <input type="radio" name="sex" value="male" checked>Male
  <input type="radio" name="sex" value="female">Female
  <select>
    <option value="China">China</option>
    <option value="US">US</option>
  </select>
  <br/>
  <textarea name="message" rows="6" cols="30">
zs
</textarea>
<br/>
Lastname
<br/>
<input type="text" value="lisi">
<input type="radio" name="sex" value="male" >Male
<input type="radio" name="sex" value="female" >Female
  <select>
    <option value="China">China</option>
    <option value="US" selected>US</option>
  </select>
  <br/>
  <textarea name="message" rows="6" cols="30">
ls
</textarea>
<br/><br/>
<input type="submit" value="submit">
  </fieldset>
  <input list="browsers">
<datalist id="browsers">
   <option value="Internet Explorer">
   <option value="Firefox">
   <option value="Chrome">
   <option value="Opera">
   <option value="Safari">
</datalist> 
</form>
  <button type="button" onclick="alert('Hello World!')">Click Me!</button>
</body>
</html>