<tr>  <th>輸入名稱：</th>  <td><input type='text' class='normal' name='name' pattern='required'   {    //獲取表單ID   var cashName = document.getElementById("checkText").value;    //正則匹配    var result=cashName.match(/[`~!@#$%^&*()_+<>?:"{},.//;'[/]]/im);     if(result!=null) {         document.getElementById("checkText").value="";     alert ("名稱不能含有非法字符！");   }     }