Kabiriel Anand Raj

Validation textbox allow only numbers in keypress


 function AllowNumbersOnly(input, kbEvent) {
            var keyCode, keyChar;
            keyCode = kbEvent.keyCode;
            if (window.event)
                keyCode = kbEvent.keyCode; // IE
            else
                keyCode = kbEvent.which; //firefox
            if (keyCode == null) return true;
            // get character      
            keyChar = String.fromCharCode(keyCode);
            var charSet = "0123456789";
            // check valid chars    
            if (charSet.indexOf(keyChar) != -1) return true;
            // control keys
            if (keyCode == null || keyCode == 0 || keyCode == 8 || keyCode == 9 || keyCode == 13 || keyCode == 27) return true;
            return false;
        }

  <asp:TextBox ID="txtqusno" runat="server" onkeypress="return AllowNumbersOnly(this,event)"></asp:TextBox>