I have 3 textboxes.   

* Price
* Percent
* Result

I want to display result on Result textbox when value of Price textbox or Percent is change.

The formula is very easy but I don't know what it doesn't work !

```
Result = Percent/100 * price

```

Percent just can be between values 0 to 9 .
I wrote this code . where is the problem from ?

```
  var textbox = $("#<%= txtTaxPercent.ClientID %>");
            var ResultTextbox = $("#<%= txtfctTaxValue.ClientID %>");
            var PriceTextbox = $("#<%= txtPurePrice.ClientID %>");
            $(textbox).keydown(function (e) {
                var Result1;
                Result1 = (parseFloat(textbox.val()) / 100) * parseInt(PriceTextbox.val());
                ResultTextbox.val('');
                ResultTextbox.val(Result1);
            });
            $(PriceTextbox).keydown(function (e) {
                var Result2;
                Result2 = (parseFloat(textbox.val()) / 100) * parseInt(PriceTextbox.val());
                ResultTextbox.val('');
                ResultTextbox.val(Result2);
            });

```