Check to see if the user is on iPad, iPod, or iPhone

iCheck.js

function iCheck(func){
    if (!(navigator.userAgent.match(/iPhone/i)) || !(navigator.userAgent.match(/iPod/i)) || !(navigator.userAgent.match(/iPad/i))) {
                func(navigator.userAgent);
    }
}

// Usage        
iCheck(function(agent){
    // You can use a case select statement to 
    // evaluate what actions you want to do
    alert(agent);
});