Validation for Html Page Fields

TEXTBOX

For Capital Letter:

<div class="form-group">
      <label>Student Name:</label>
           <asp:TextBox ID="txtPupilName"  Style="text-transform:uppercase"  CssClass="form-control"  data-error="Enter Full Name" Enabled="false">
           </asp:TextBox>
</div>

<asp:TextBox ID="TextBox1" runat="server" CssClass="form-control text-uppercase"></asp:TextBox>

For Lower Letter:

<div class="form-group">
      <label>Student Name:</label>
           <asp:TextBox ID="txtPupilName"  Style="text-transform:lowercase"  CssClass="form-control"  data-error="Enter Full Name" Enabled="false">
           </asp:TextBox>
</div>

<asp:TextBox ID="TextBox1" runat="server" CssClass="form-control text-lowercase"></asp:TextBox>

For First Letter Capital :

<div class="form-group">
      <label>Student Name:</label>
           <asp:TextBox ID="txtPupilName"   Style="text-transform:capitalize"  CssClass="form-control"  data-error="Enter Full Name" Enabled="false">
           </asp:TextBox>
</div>

<asp:TextBox ID="TextBox1" runat="server" CssClass="form-control text-capitalize"></asp:TextBox>