FireFox and Internet Explorer detection -- different code for different browser?

So my myspace was made for Internet Explorer, with internet explorer, and I recently discovered that it messes up for some people who use firefox.

Okay, all people who use firefox.

Basically, what I wanted to know, was if there was a way to put the detection code in there, and do something like

if FireFox{ this code here}

if InternetE{this code here}

else {}

or something like that

I know that (something) like this is available on normal websites, but I don't know if it's compatible with myspace! Help please!

Thanks in advance!!

FireFox and Internet Explorer detection -- different code for different browser?

if (browserType == "Microsoft Internet Explorer")

{

execute your code;

}

if(browserType == "Firefox")

{

execute your code;

}

else

{

execute alternate code;

}