title: How to allow only decimal numbers in a TextBox
body: <p>I am working on asp.net web application.</p>
  
  <p>I have a textbox in that textbox I need to allow decimal number before pressing the submit button. so how to do this at client side before submitting the submit button. </p>
  
  <p>if it could be done by javascript, ajax aur from the code behind please let me know. </p>