How can I combine two "if" into one?

Question

This example is from the lesson about The Date object:

function printTime() {
var d = new Date();
var hours = d.getHours();
var mins = d.getMinutes();
var secs = d.getSeconds();
document.body.innerHTML = hours+":"+mins+":"+secs;
}
setInterval(printTime, 1000);

I can add "0" to my numbers with:

if (mins < 10) {
mins = "0" + mins;
}
if (secs < 10) {
secs = "0" + secs;
}

Ok, but how can I combine these two "if" into one? I don't need two "if", I would like one formula (/some "function"/) for two examples (mins & secs) at the same time.

Answer 1

It is fine as it is, but if you really want to, you can create a function that prepends a "0" if the argument is lower than 10, and return it.

function formatFix(n) {
if (n < 10) {
n = "0" + n;
}
return (n.toString());
}

Answer 2

@Zen, isn't the ".toString()" unnecessary? Or are you just making sure that it will return a string no matter what the input was..?