js保留2位小数,不足补0

function toDecimal(x) {
	var f = parseFloat(x);
	
	if (isNaN(f)) {
		return false;
	}
	var f = Math.round(x * 100) / 100;
	var s = f.toString();
	var rs = s.indexOf(".");
	if (rs < 0) {
		rs = s.length;
		s += ".";
	}
	while (s.length <= rs + 2) {
		s += "0";
	}
	// return s;
	console.log(s)
}

当多个input调用时赋不了值:

AA() {
	this.age = this.toDecimal(this.age, 4);
},
BB() {
	this.height = this.toDecimal(this.height, 2);
}

input调用对应AA、BB方法；