<!DOCTYPE html>
<html>
<body>
<h1>Demo: JavaScript Boolean</h1>
<p id="p1"></p>
<p id="p2"></p>
<p id="p3"></p>
<p id="p3"></p>
<p id="p4"></p>
<p id="p5"></p>
<p id="p6"></p>
<p id="p7"></p>
<script>
var bool1 = new Boolean("");
document.getElementById("p1").innerHTML = bool1;
var bool2 = new Boolean(0);
document.getElementById("p2").innerHTML = bool2;
var bool3 = new Boolean(undefined);
document.getElementById("p3").innerHTML = bool3;
var bool4 = new Boolean(null);
document.getElementById("p4").innerHTML = bool4;
var bool5 = new Boolean(NaN);
document.getElementById("p5").innerHTML = bool5;
var bool6 = new Boolean("some text");
document.getElementById("p6").innerHTML = bool6;
var bool7 = new Boolean(1);
document.getElementById("p7").innerHTML = bool7;
</script>
</body>
</html>