For example there are 4 input fields?

How to apply the formula? For example, folded and multiply by another number?

And as in input to enter only numbers?

How to apply the formula? For example, folded and multiply by another number?

And as in input to enter only numbers?

asked March 12th 20 at 08:43

1 answer

answered on March 12th 20 at 08:45

> How to apply the formula? For example, folded and multiply by another number?

To Use JavaScript

> And how to input to enter only numbers?

To use JavaScript - hang function to the onkeyup event, which will be cut from the field all except numbers.

You can even specify the type="number" (htmlbook.ru/html/input/type) but, not all browsers supported it seems.

To Use JavaScript

> And how to input to enter only numbers?

To use JavaScript - hang function to the onkeyup event, which will be cut from the field all except numbers.

You can even specify the type="number" (htmlbook.ru/html/input/type) but, not all browsers supported it seems.

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