附上页面代码

< asp:TextBox ID = " txtAnswer "  runat = " server "  style = " width:180px "   ></ asp:TextBox >                       < span style  = " color :Red " >*</ span >                       < asp:RequiredFieldValidator                          ControlToValidate  = " txtAnswer "                           ID = " RequiredFieldValidator4 "                           runat = " server "                           ErrorMessage = " (此项必填) "                         Display = " None " >                      </ asp:RequiredFieldValidator >                      < asp:RegularExpressionValidator                              ControlToValidate = " txtAnswer "                                ID = " RegularExpressionValidator8 "                               runat = " server "                               ErrorMessage = " 您的答案少于四个字符或者多于五十个字符 "                                ValidationExpression = " ^.{4,50}$ "                              Display = " None " >                      </ asp:RegularExpressionValidator >                      </ li >                       < uc:InteractiveMessager ID  = " interactiveMessager5 "                           ControlToMessage  = " txtAnswer "                           runat  = " server "                           Text = " 用于取回密码。请尽量设得复杂一些，以防被人用找回密码功能窃取您的帐号。长度在四到五十个字符之间。 "                          ValidatorOkMessage  = " 答案已经输入 "    >                       </ uc:InteractiveMessager >