Let's figure out what the user's operating system is and put it in a variable called userPlatform. The values will be of a string data type and will be of the following values: win (for Windows), mac (for Mac OS), linux (for Linux machines), ipod (Apple iPhone and Apple iPod touch), and other (platform can't be detected or is unrecognized).

window.addEvent('domready', function(){
var userPlatform = Browser.Platform.name;
});

Next, we build a function called pageCustomizer that will customize our page. We'll pass userPlatform (later on) to it so that it knows what platform it'll be working with. Let's set that up now:

window.addEvent('domready', function(){
var userPlatform = Browser.Platform.name;
// Customizes download page depending on client's platform
var pageCustomizer...