自定义表单的单行文本框如何验证输入的手机号是否为真实手机号 表单代码如下 <form name="myform1" action="/plus/form/form.asp" target="hidform1" method="post"> <table width="100%" border="0" cellspacing="2" cellpadding="1"> <input type="hidden" value="Save" name="action"/> <input type="hidden" value="1" name="id"/> <input type="hidden" value="{$ChannelID}" name="m"/> <input type="hidden" value="{$InfoID}" name="d"/> <input type="hidden" value="{$ToUserName}" id="tousername" name="tousername"/> <tr class="tdbg"> <td align="right" class="lefttdbg">联系方式：</td> <td><input type="text" maxlength="11" class="upfile" style="width:200px" id="KS_lxfs" name="KS_lxfs" value="" placeholder="输入联系方式"><span class="formstrck1" id="联系方式|%|KS_lxfs|%|1" style="display:none" ></span></td> </tr> <tr><td colspan="2" class="subtdbg" align="center"><input type="submit" value="确认提交" name="submit1"></td></tr> </table> </form>