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Your Third Program
Third program
Try it out. You probably won't notice a change from what you saw with program two, unless you are using a browser other than Netscape or IE. The complete program in its HTML looks like this:
<html>
<head><title>Third Program</title>
</head>
<body>
<SCRIPT>
<!--
if (navigator.appName.indexOf("Netscape") != -1)
document.writeln("Hey Netscape user!");
else if (navigator.appName.indexOf("Internet Explorer") != -1)
document.writeln("Hey IE user!");
else
document.writeln("You're not using Netscape or IE");
//-->
</SCRIPT>
</body>
</html>
The program still won't recognize "netscape" with a lower case "n". We could add one more if test like so:
else if (navigator.appName.indexOf("netscape") != -1)
before the last else. (There are other things we could do, too.)
This discussion should highlight the fact that you can use if tests to examine information and make the program do different things based upon whether the information meets certain criteria or not. Using if statements is a big part of most programming.
Next time we revisit beginning programming, we'll see how to repeat ourselves!
Written July 31, 2000
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