I made a few changes to my aspx page & now it is being rendered blank. Actually it does show the div tag that contains everything else. The everything else is invisible though. Can someone point out whats causing the problem?Heres the HTML:\[code\] <%@ Page StylesheetTheme="" Title="" Language="C#" MasterPageFile="~/Site.Master"AutoEventWireup="true" CodeBehind="frmMyAccountMyProfile.aspx.cs" Inherits="WebApplication1.frmMyAccountMyProfile" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %> <asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server"><script type="text/javascript"> function CheckType(type) { document.getElementById("hdnfld").value = http://stackoverflow.com/questions/15740294/type; alert(document.getElementById("hdnfld").value); return false; } function confirmAction() { if (confirm('Are you sure, you want to delete?')) { // allow the form to post the data. return true; } else { // disallow the form submission. return false; } } </script><link href="http://stackoverflow.com/questions/15740294/Styles/myStyleSheet.css" rel="stylesheet" type="text/css" /></asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"><form action=""><div class="divwrap"> <table style="width: 100%; margin-right: 0px;"> <tr> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> <asp:TabContainer ID="TabContainer1" runat="server" CssClass="ajax__tab_lightblue-theme" ActiveTabIndex="1"> <asp:TabPanel runat="server" HeaderText="My Profile" ID="tbpnlMyProfile"> <HeaderTemplate> My Profile </HeaderTemplate> <ContentTemplate> <table style="width: 100%;"> <tr> <td class="colwid colht"> <asp:LinkButton ID="lnkBtnEditMyInfo" class="small-heading" runat="server" OnClick="lnkBtnEditMyInfo_Click">Edit My Info</asp:LinkButton> </td> <td> <asp:Label ID="lblFirstNameMyProfile" runat="server" Text="First Name"></asp:Label> </td> <td rowspan="3"> <aspanel ID="pnlDisplay" runat="server"> <table style="width: 100%;"> <tr> <td class="colht"> <asp:Label ID="lblMPDisplayFirstName" runat="server" Text="Label"></asp:Label> <br /> </td> </tr> <tr> <td class="colht"> <asp:Label ID="lblMPDisplayLastName" runat="server" Text="Label"></asp:Label> <br /> </td> </tr> <tr> <td class="colht"> <asp:Label ID="lblMPDisplayEmail" runat="server" Text="Label"></asp:Label> <br /> </td> </tr> </table> </aspanel> <aspanel ID="pnlEditInfo" runat="server" Visible="False"> <table style="width: 100%;"> <tr> <td class="colht"> <asp:TextBox ID="txtEditFirstName" runat="server"></asp:TextBox> </td> </tr> <tr> <td class="colht"> <asp:TextBox ID="txtEditLastName" runat="server"></asp:TextBox> </td> </tr> <tr> <td class="colht"> <asp:TextBox ID="txtEditEmail" runat="server"></asp:TextBox> </td> </tr> <tr> <td class="colht"> <asp:Button ID="btnEditInfoCancel" runat="server" CssClass="btndel" OnClick="btnEditInfoCancel_Click" Text="Cancel" /> <asp:Button ID="btnEditInfoSave" runat="server" CssClass="btn" OnClick="btnEditInfoSave_Click" Text="Save" /> </td> </tr> </table> </aspanel> </td> <tr> <td class="colht"> </td> <td class=""> <asp:Label ID="lblLastNameMyProfile" runat="server" Text="Last Name"></asp:Label> </td> </tr> <tr> <td> </td> <td class="colht"> <asp:Label ID="lblEmailMyProfile" runat="server" Text="Email"></asp:Label> </td> <tr> <td> <br /> </td> <td> </td> <td> </td> </tr> <tr> <td> <asp:LinkButton ID="lnkbtnChangePassword" runat="server" class="small-heading">ChangePassword</asp:LinkButton> </strong> </td> <td> <asp:LinkButton ID="lnkChangePassword" runat="server" OnClick="lnkChangePassword_Click">Click here to change your password</asp:LinkButton> <br /> <aspanel ID="pnlChangePassword" runat="server" CausesValidation="False" Visible="False"> <table style="width: 100%;"> <tr> <td class=""> </td> <td style="width: 150px"> <asp:Label ID="lblOldPassword" runat="server" CssClass="lbl2" Text="Old Password"></asp:Label> </td> <td class=""> <asp:TextBox ID="txtOldPassword" runat="server" CssClass="txtbx2" TextMode="Password"></asp:TextBox> </td> <td class=""> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtOldPassword" ErrorMessage="Please enter password!"></asp:RequiredFieldValidator> </td> </tr> <tr> <td class=""> </td> <td class=""> <asp:Label ID="lblNewPassword" runat="server" CssClass="lbl2" Text="New Password"></asp:Label> </td> <td class=""> <asp:TextBox ID="txtNewPassword" runat="server" CssClass="txtbx2" TextMode="Password"></asp:TextBox> </td> <td class=""> <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtNewPassword" ErrorMessage="Please choose new password!"></asp:RequiredFieldValidator> </td> </tr> <tr> <td> </td> <td class=""> <asp:Label ID="lblConfirmPassword" runat="server" CssClass="lbl2" Text="ConfirmPassword"></asp:Label> </td> <td> <asp:TextBox ID="txtConfirmPassword" runat="server" CssClass="txtbx2" TextMode="Password"></asp:TextBox> </td> <td> <asp:CompareValidator ID="CompareValidator1" runat="server" ControlToCompare="txtNewPassword" ControlToValidate="txtConfirmPassword" ErrorMessage="CompareValidator"></asp:CompareValidator> </td> </tr> <tr> <td> </td> <td class=""> <asp:Button ID="btnCancel1" runat="server" CausesValidation="False" CssClass="btndel" OnClick="btnCancel1_Click1" Text="Cancel" Width="60px" /> </td> <td> <asp:Button ID="btnSaveNewPassword" runat="server" CssClass="btn" OnClick="btnSaveNewPassword_Click" Text="Save" /> </td> <td> </td> </tr> <tr> <td> </td> <td class=""> </td> <td> </td> <td> </td> </tr> </table> </aspanel> </td> <td> </td> </tr> <br /> <br /> <tr> <td> </td> <td colspan="2"> <br /> </td> </tr> <tr> <td> <asp:LinkButton ID="lnkbtnEditContactNo" runat="server" class="small-heading" OnClick="lnkbtnEditContactNo_Click">Edit Contact No.</asp:LinkButton> </td> <td colspan="2"> <asp:Label ID="lblDisplayContactNo" runat="server" Text="Label"></asp:Label> <aspanel ID="pnlEditContactNo" runat="server" Visible="False"> <aspropDownList ID="ddlEditCountryNameCode" runat="server" CssClass="ddl2" OnSelectedIndexChanged="ddlEditCountryNameCode_SelectedIndexChanged"> </aspropDownList> <asp:TextBox ID="txtEditMobile" runat="server" CssClass="txtbx2"></asp:TextBox> <br /> <asp:Button ID="btnCancel" runat="server" CssClass="btndel" OnClick="btnCancel_Click" Text="Cancel" /> <asp:Button ID="btnSave" runat="server" CssClass="btn" OnClick="btnSave_Click" Text="Save" /> </aspanel> </td> </tr> </tr> </tr> </table> </ContentTemplate> </asp:TabPanel> <asp:TabPanel ID="tbpnlAddressbook" runat="server" HeaderText="Addressbook"> <HeaderTemplate> Addressbook </HeaderTemplate> <ContentTemplate> <table style="width: 100%;"> <tr> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> <asp:LinkButton ID="lnkbtnViewChange" runat="server" class="small-heading">View / Change</asp:LinkButton> </td> <td> <aspropDownList ID="ddlName" runat="server" AutoPostBack="True" CssClass="ddl2" OnSelectedIndexChanged="ddlName_SelectedIndexChanged"> </aspropDownList> </td> </tr> <tr> <td> </td> <td> <div> <asp:Label ID="lblDisplayFirstName" runat="server" Text="Label"></asp:Label> <asp:Label ID="lblDisplayLastName" runat="server" Text="Label"></asp:Label> <br /> <asp:Label ID="lblDisplayAddressLine1" runat="server" Text="Label"></asp:Label> <br /> <asp:Label ID="lblDisplayAddressLine2" runat="server" Text="Label"></asp:Label> <asp:Label ID="lblDisplayAddressLine3" runat="server" Text="Label"></asp:Label> <asp:Label ID="lblDisplayCity" runat="server" Text="Label"></asp:Label> <br /> <asp:Label ID="lblDisplayState" runat="server" Text="Label"></asp:Label> <br /> <asp:Label ID="lblDisplayCountry" runat="server" Text="Label"></asp:Label> <br /> <asp:Label ID="lblDisplayPostalCode" runat="server" Text="Label"></asp:Label> <br /> <asp:Button ID="btnEdit" runat="server" CssClass="roundcorner btn" OnClick="btnEdit_Click" OnClientClick="return CheckType('Edit');" Text="Edit" CausesValidation="False" /> <asp:ModalPopupExtender ID="btnEdit_ModalPopupExtender" runat="server" DynamicServicePath="" Enabled="True" TargetControlID="btnDummy" PopupControlID="pnlMyAddressBook" BackgroundCssClass="modalBackground roundcorner"> </asp:ModalPopupExtender> <asp:Button ID="btnDelete" runat="server" CssClass="btndel" OnClick="btnDelete_Click1" OnClientClick="javascript: return confirmAction()" Text="Delete" /> <asp:Button ID="btnDummy" runat="server" Text="Dummy" Visible="False" /></div> </td> </tr> <tr> <td> </td> <td> <asp:LinkButton ID="lnkbtnAddNewAddress" runat="server" CausesValidation="False" onclick="lnkbtnAddNewAddress_Click1">AddNewAddress</asp:LinkButton> <asp:ModalPopupExtender ID="lnkbtnAddNewAddress_ModalPopupExtender" runat="server" DynamicServicePath="" Enabled="True" TargetControlID="lnkbtnAddNewAddress" PopupControlID="btnDummy" BackgroundCssClass="modalBackground roundcorner"> </asp:ModalPopupExtender> </td> </tr> </table> <div class="divwrap"> <aspanel ID="pnlMyAddressBook" runat="server" BackColor="White" CssClass="roundcorner" Visible="False"> </aspanel> </div> <asp:RoundedCornersExtender ID="pnlMyAddressBook_RoundedCornersExtender" runat="server" Enabled="True" TargetControlID="pnlMyAddressBook"> </asp:RoundedCornersExtender> </table> </ContentTemplate> </asp:TabPanel> </asp:TabContainer> <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"> </asp:ToolkitScriptManager> </td> <td> </td> </tr> </table> <asp:HiddenField ID="hdnfld" runat="server" /></div></form> </asp:Content>.divwrap{padding: 3%;display: inline-block;margin: 3%;border: 1px solid #66CCFF;vertical-align: middle;width: auto;position: relative; }\[/code\]