Number Validation in Textbox of ASP.NET Using Regular Expression Validator

Below is a simple example of Number Validation in Textbox of ASP.Net Using Regular Expression Validator. 
It will also allow all decimal number, excluding all alphanumeric characters.

<asp:TextBox ID="AssetsTextBox" runat="server" Width="240px"></asp:TextBox>                               
<asp:RegularExpressionValidator ID="revAssets" runat="server" 
ErrorMessage="Assets must be a number" Font-Bold="False" 
ControlToValidate="AssetsTextBox" Display="Dynamic" >

Display Text Upside down using CSS3

Below example will help you to learn how to Display some text Upside down on the webpage using CSS3.

<title>Display Text Up side down Example...</title>
<style type="text/css">
    -o-transform: rotate(-180deg);  /* Opera 10.5 */
    -webkit-transform: rotate(-180deg);  /* Safari 3.1+, Chrome */
    filter:  progid:DXImageTransform.Microsoft.BasicImage(rotation=2);  /* IE6,IE7 */
    ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=2)"; /* IE8 */
    -moz-transform: rotate(-180deg);  /* FF3.5+ */        
    position: absolute; 
<div class="displayUpsideDown">ENJOY SAMPLE TEXT HERE!!!</div>