Javascript iPhone selection

Quick question. I am writing a website and would like to redirect users to different webpages depending on their browser and also their version of the iPhone operating software. I know you may come back at me and say it should be up to the user to decide which site they view, they don't have a choice in this matter.

The code I am using is in javascript and can identify between the different browsers but not the iPhone operating systems which is the key to this. This is the code:

if(navigator.userAgent.match(/iPhone/i)) {
    if(navigator.userAgent.match(Version/4)){
        if(document.cookie.indexOf("iphone_redirect=false") == -1) window.location ="iPhone4.html";
    }
    if(document.cookie.indexOf("iphone_redirect=false") == -1) window.location ="iPhone.html";
}
//Rest of the site goes here

Not sure if the brackets are right here it's early and may have got tha开发者_StackOverflowt wrong but any help will be appreciated.

Sam

This should work:

if(navigator.userAgent.match(/iPhone/i)) {
    if(navigator.userAgent.match(/iPhone OS 4/i)) {
        if(document.cookie.indexOf("iphone_redirect=false") == -1) {
            window.location ="iPhone4.html";
        }
    }
    else {
        if(document.cookie.indexOf("iphone_redirect=false") == -1) {
            window.location ="iPhone.html";
         }
    }
}

The iPhone 4 user agent string is setup like this:

Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7

Should help you the old iPhone is:

Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16

So in your code, the version would be 4.0.5 for the iPhone 4 and 4.0 for the iPhone.