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how to validate phone and mobile number in javascript[
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Use this Regular Expression
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server"
ControlToValidate="TextBox1" ErrorMessage="Please enter valid Mobile number!"
ValidationExpression="^([7-9]{1})([0-9]{9})$"></asp:RegularExpressionValidator>