Code trolling - Exponentiation

Help. I need to power the number. I already know how to add, subtract, multiply, and divide, but how can I power numbers? I need this quickly. Plz post the code.

HTML

<pre id="output"></pre>

JavaScript

function out()
{
    var args = Array.prototype.slice.call(arguments, 0);
    document.getElementById('output').innerHTML += args.join(" ") + "\n";
}

// See http://codegolf.stackexchange.com/questions/17480/code-trolling-exponentation
function power(base, pow)
{
    var result = 0;
    while (result != Math.pow(base, pow))
    {
        result++;
    }
    return result;
}

// Poor-man's unit-testing
out(Math.pow(2, 5));
out(power(2, 5));