<html>
<body>
<button onclick="myFunction()">Click me</button>
<button onclick="myFunction2()">Click me</button>
<button onclick="myFunction3()">Click me</button>
<p id="demo1"></p>
<p id="demo2"></p>
<p id="demo3"></p>
</body>
</html>
<script>
var a = 0;
var b=0
var d= 0;
function myFunction() {
a = a + 5;
document.getElementById("demo1").textContent = a;}
</script>
<script>
function myFunction2() { d = d + 5;
document.getElementById("demo2").innerHTML = d;}
</script>
<script>
function myFunction3() { b = b + 5;
document.getElementById("demo3").innerHTML = b;}
</script>
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