Javascript VS PHP rounding

Question

I am having some problems with the way PHP and javascript round numbers. I am using PHP\'s round function and this javascript function:

Answer 1

I was thinking a bit on this, and wanted to share my solution, let it not go to waste:

function roundNumber(number, decimals) {      
    var d = parseInt(decimals,10),
        dx = Math.pow(10,d),
        n = parseFloat(number),
        f = Math.round(Math.round(n * dx * 10) / 10) / dx;
    return f.toFixed(d);
}

This does not use string functions, or any forced up or down rounding.

Test it here: http://jsfiddle.net/inti/hMrsp/4/

Edit: corrected, was cutting down zeros at the end