<!DOCTYPE html>
<html>
<body>

<p>Click the Start button to output "Hello" after 2 seconds.</p>

<p>In this example, we also output the parameters that were passed to the alertFunc() function (does not work in IE9 and earlier).</p>

<button onclick="myStartFunction()">Start</button>

<p id="demo"></p>

<p id="demo2" style="color:red;"></p>

<script>
var myVar;

function myStartFunction() {
    myVar = setTimeout(alertFunc, 2000, "First parameter", "Second parameter");
}

function alertFunc(param1, param2) {
    document.getElementById("demo").innerHTML += "Hello ";

    document.getElementById("demo2").innerHTML = "Parameters passed to alertFunc(): <br>"
    + param1 + "<br>" + param2 + "<br>";
}
</script>

</body>
</html>