How do I create dynamic variable names inside a loop?

I'm working on an ajax google maps script and I need to create dynamic variable names in a for loop.

for (var i = 0; i < coords.length; ++i) {
    var marker+i = "some stuff";
}

What I want to get is: marker0, marker1, marker2 and so on. and I guess there is something wrong with marker+i

Firebug gives me this: missing ; before statement