html中 这个代表什么意思？？怎么处理？？
<body><table width="367" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td background="images/back.gif"><table width="367" border="0" align="center" cellpadding="0" cellspacing="0"> <form name="form1" method="post" action="index.php" onsubmit="return chkinput(this)"> <tr> <td height="30" colspan="4"> </td> </tr> <tr> <td width="82" height="25"><div align="center" class="STYLE1">网关地址</div></td> <td width="169"> <input type="text" name="ip" class="inputcss" size="25"></td> <td width="38"><span class="STYLE1">端口：</span></td> <td width="78"><input type="text" name="port" size="5" class="inputcss"></td> </tr> <tr> <td height="20"><div align="center" class="STYLE1">用户名：</div></td> <td height="20"> <input type="text" name="username" class="inputcss" size="25"></td> <td height="20" colspan="2"> </td> </tr> <tr> <td height="20"><div align="center" class="STYLE1">密码：</div></td> <td height="20"> <input type="password" name="userpwd" class="inputcss" size="25"></td> <td height="20" colspan="2"><input type="submit" name="submit" class="buttoncss" value="发送" /></td> </tr> <tr> <td height="20"><div align="center" class="STYLE1">发送手机号：</div></td> <td height="20"> <input type="text" name="telnumber" class="inputcss" size="25"></td> <td height="20" colspan="2"><input type="reset" name="reset" class="buttoncss" value="重写" /></td> </tr> <tr> <td height="20"><div align="center" class="STYLE1">接收手机号：</div></td> <td height="20"> <input type="text" name="receivenumber" class="inputcss" size="25"></td> <td height="20" colspan="2"> </td> </tr> <tr> <td height="72"><div align="center" class="STYLE1">短信内容：</div></td> <td colspan="3"> <textarea name="content" cols="40" rows="5" class="inputcss"></textarea></td> </tr> <tr> <td height="25" colspan="4"><div align="center"></div></td> </tr></form> </table></td> </tr></table>
