使用方法
1.引入
  <script src="scriptaculous/lib/prototype.js" type="text/javascript"></script>
  <script src="scriptaculous/src/effects.js" type="text/javascript"></script>
  <script type="text/javascript" src="fabtabulous.js"></script>
  <script type="text/javascript" src="validation.js"></script>
  <link rel="stylesheet" type="text/css" href="style.css" />
2.<form name="form1" id="form1">
         <a href="#form1">......</a>             //#+form的ID
   </form>
3.
     <input name="field5" id="field5" class="required" />  //class内输入validation.js类库的方法 required代表为空判断
4.在</form>后加上这句
  <script type="text/javascript">
      var valid = new Validation('from1', {immediate : true});
  </script>