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P. 202
var checkNaN2 = isNaN(123);
document.writeln("isNaN('Hello'): " + checkNaN1+ "<BR>");
document.writeln("isNaN(123): " + checkNaN2);
</SCRIPT>
</BODY>
</HTML>
Output:
Example 12: To demonstrate the use of alert function
In this example the functions myFunction1( ) and myFunction2( ) are called and executed when the respective
button is clicked. The first function display text in an alert box. The second function adds 3 numbers and then
displays the result.
<!DOCTYPE HTML>
<HTML>
<HEAD>
<TITLE>Alert Box</TITLE>
</HEAD>
<SCRIPT>
function myFunction1() {
alert("Hi!\nIts a Beautiful day!");
}
function myFunction2() {
var sum=3+5+8;
alert("The sum is "+sum);
}
</SCRIPT>
</HEAD>
<BODY>
<H2>JavaScript code to display text in 2 lines in an alertbox</H2>
200 Touchpad Web Applications (Ver. 2.0)-XII

