<script type="text/javascript">
var username = "test";
if(username == "test")
document.write("Welcome");
else
document.write("Access Denied!");
document.write("<br /><br />Try again?<br /><br />");
</script>
While '14' == 14 is true (because by converting either the left side
value to a number or converting the right side value to a text string
will result in both being the same) '123' === 123 is false since one
value is a text string and the other is a number.
The === operator does the same thing with one minor difference. This
operator does not convert data from one type to another.