public void Check_MemberEmail() { string member_email = tools.CheckStr(Request["val"]); if (member_email == "") { Response.Write("<font color=\"#cc0000\">请输入E-mail!</font>"); return; } else { if (tools.CheckEmail(member_email)) { if (Check_Member_Email(member_email)) { Response.Write("<font color=\"#cc0000\">该邮件地址已被使用。请使用另外一个邮件地址进行注册</font>"); return; } else { Response.Write("<font color=\"#00a226\">E-mail输入正确!</font>"); return; } } else { Response.Write("<font color=\"#cc0000\">无效的E-mail!</font>"); return; } } }