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<!DOCTYPE html>
<html>
​
<script>
var txt = "";
function message() {
  try {
    adddlert("Welcome guest!");
  }
  catch(err) {
    txt = "There was an error on this page.\n\n";
    txt += "Click OK to continue viewing this page,\n";
    txt += "or Cancel to return to the home page.\n\n";
    if(!confirm(txt)) {
      document.location.href = "../index.html";
    }
  }
}
</script>
​
<body>
​
<h2>JavaScript Error Handling</h2>
​
<input type="button" value="View message" onclick="message()" />
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_try_catch2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:28:15 GMT -->
</html>
​
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