Allow only Numbers / Numerics in Textbox

Here is the script to make sure that user will only enter numbers:


<script type="text/javascript">
 var specialKeys = new Array();
 specialKeys.push(8); //Backspace
 function IsNumeric(e) 

 {
    var keyCode = e.which ? e.which : e.keyCode
    var ret = ((keyCode >= 48 && keyCode <= 57) || specialKeys.indexOf(keyCode) != -1);
    //document.getElementById("format").style.display = ret ? "none" : "inline";
    return ret;
 }
</script>
Call this script on your Textbox onkeypress Event

<asp:TextBox ID="mytxtbox" runat="server" onkeypress="return IsNumeric(event);"></asp:TextBox>

Happy Coding !!!