buddy here is regular expression for Url Vaildation
“http://([w-]+.)+[w-]+(/[w- ./?%&=]*)?”
asp.net control would be look like
<asp:RegularExpressionValidator ID=”RegularExpressionValidator1″ ControlToValidate=”XYZl” ValidationExpression=”http://([w-]+.)+[w-]+(/[w- ./?%&=]*)?” runat=”server” ErrorMessage=”Invalid URL”></asp:RegularExpressionValidator>
enjoy