title: How to use javascript to get an ASP.NET's Textbox Control's Value
body: <p>Suppose I have an ASP.NET Text Box as Below : </p>
  
  <pre><code>&lt;asp:TextBox ID="txtQuantity" runat="server" Text="0"&gt;&lt;/asp:TextBox&gt;
  </code></pre>
  
  <p>I want to get this box's current value in javascript. How can I access this element?</p>