How to reset the value of all buttons with one button

Issue

I can't figure out how to reset the value of all buttons back to 0 as default by just one reset button, can anyone help please?

JS

var button1 = 0;
var button1 = 0;

function onClick1() {
  button1 += 1;
  document.getElementById("button1").innerHTML = button1;
  };

 function onClick2() {
  button2 += 1;
  document.getElementById("button2").innerHTML = button2;
 };

HTML

<button type="button" onClick="onClick1()">Click</button>
<p><a id="button1">0</a></p>
<button type="button" onClick="onClick2()">Click</button>
<p><a id="button2">0</a></p>

Solution

This should work:

JS:

function onClickReset() {
  button1
  document.getElementById("button1").innerHTML = button1;
  button2
  document.getElementById("button2").innerHTML = button2;
  // .. other code to set buttons to default state
}

HTML:

<button type="button" onClick="onClickReset()">Reset</button>

Answered By - Ling Zhong