Prüfen auf Dezimalzahl

[admin]

So sollte es klappen

Code:

function calc(theform) {
    var num = theform;
    var with2Decimals = num.toString().match(/^-?\d+(?:\.\d{0,2})?/)[0]
    return Number(with2Decimals).toFixed(2);
}
str=5103.156201200;
console.log(calc(str));//5103.15
str=5103.151201200;
console.log(calc(str));//5103.15
str=5103;
console.log(calc(str));//5103.00
str=5103.9;
console.log(calc(str));//5103.90