Min första snippet!

function round(number, precision) {
if(precision == undefined) {
precision = 0;
}

var precisionfactor = Math.pow(10, precision);
number = Math.round(number * precisionfactor) / precisionfactor;
number += "";
var decimals = number.split('.');
if(decimals[1] != undefined && decimals[1].length < precision) {
for(i=0;i<precision;i++) {
number += "0";
}
} else if(decimals[1] == undefined) {
number += ".";
for(i=decimals[1].length;i<precision;i++) {
number += "0";
}
}

return number;
}