Button that increments and one that clears

Hello, could anyone help me with a code for a button when clicked, incremements by 1. I have a numeric field (not sure if it should be a numeric or text field), and a button. I want when the user clicks the button, the number in either the text or numeric field increments by 1. I also need a code for another button, that when clicked, clears the text field. I appreciate your help.

To increment....
// form1.page1.subform1.incBtn::click - (JavaScript, client)
form1.page1.subform1.nf.rawValue = form1.page1.subform1.nf.rawValue + 1;
if (form1.page1.subform1.tf.isNull) {
form1.page1.subform1.tf.rawValue = "0";
var numStr = form1.page1.subform1.tf.rawValue;
form1.page1.subform1.tf.rawValue = parseInt(numStr) + 1;
To clear....
// form1.page1.subform1.clearBtn::click - (JavaScript, client)
form1.page1.subform1.nf.rawValue = null;
form1.page1.subform1.tf.rawValue = null;

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