JavaScript rounding to negative decimal places like Excel

Question

I am trying to round a number in JavaScript to match the following Excel style rounding.

Excel:

=ROUND(123456,-1)

which outputs

123460

How can I get JavaScript to round to negative decimal places?

Answer 1

function round(x, places)
{
    var shift = Math.pow(10, places);
    return Math.round(x * shift) / shift;
}