Web Forms :: Allowing Only Number On TextBox

Oct 31, 2013

I am using VS2010 and i am trying to block users typing alphabets and special charecters( allowed only numbers). ?I have written javascript and calling onkeydown and onkeyup events of my textbox. seems havascript doesn't firing up. am getting Uncaught ReferenceError javascript below is my  user control code. Not sure why the javascript is not getting fired.

<asp:TextBox ID="txtAmount" runat="server"
onkeyup = "keyUP(event.keyCode)" onkeydown = "return isNumeric(event.keyCode);" onpaste = "return false;"
MaxLength="8" autoComplete = "off"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvAmount" runat="server" ControlToValidate="txtAmount"
Display="Dynamic" ValidationGroup="Rewards" ErrorMessage="*" />
 
[code]....

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