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<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript Functions</h2>
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<p>In this example, myFunction is a function constructor:</p>
​
<p id="demo"></p>
​
<script>
function myFunction(arg1, arg2) {
  this.firstName = arg1;
  this.lastName  = arg2;
}
​
var x = new myFunction("John","Doe")
document.getElementById("demo").innerHTML = x.firstName; 
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_invoke_constructor by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:39:36 GMT -->
</html>
​
​
​
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