邮箱验证

 把如下代码加入<body>区域中
 <script language="JavaScript">
<!--
function validate_form() {
  validity = true;
  if (!check_empty(document.form.NAME.value))
        { validity = false; alert('对不起!请你填入你的姓名。'); }
  if (!check_email(document.form.EMAIL.value))
        { validity = false; alert('对不起!请重新正确填入Email地址。'); }
  if (!check_empty(document.form.DESCRIPTION.value))
        { validity = false; alert('对不起!请你在"简要描述"留言填入留言。'); }
  if (validity)
        alert ("                      谢谢你的来信.                                  "
                + "              你所填的信息将以Email形式发送给我,                      "
                + "              假如你认为本站内容不错的话,请将本                       "
                + "              介绍给你的朋友,希望大家经常光顾本站。");
  return validity;
}

function check_empty(text) {
  return (text.length > 0);
}

function check_email(address) {
  if ((address == "")
    || (address.indexOf ('@') == -1)
    || (address.indexOf ('.') == -1))
      return false;
  return true;
}

// -->
</script>
<form name="form" method="post" action="mailto:[email protected]?SUBJECT=网友的留言"
enctype="text/plain" onSubmit="return validate_form()">
              <table width="90%" border="0" cellspacing="0" cellpadding="0">
                <tr>
                  <td width="77%">
                    <div align="left"><font size="3"><b>姓名:</b></font>
                      <input type="text" size=46 name="NAME">
                      <br>
                      <b><font size="3">Email地址: </font></b>
                      <input type="text" size=46 name="EMAIL">
                      <br>
                      <b><font size="3">URL地址: </font></b>
                      <input type="text" size=46 name="URL" value="http://">
                      <br>
                      <b><font size="3">留言内容:</font></b><br>
                      <textarea name="DESCRIPTION" rows=8 cols=45 wrap=virtual></textarea>
                    </div>
                  </td>
                </tr>
                <tr>
                  <td>
                    <div align="center"><br>
                      <input type="submit" name="submit" value="发送">
                      <input type="reset" value="清除" name="reset">
                    </div>
                  </td>
                </tr>
              </table>
              </form>
 

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