<!DOCTYPE html>charset="utf-8"W3Cschool教程(w3cschool.cn)document.write(parseFloat("10") + "<br>");document.write(parseFloat("10.00") + "<br>");document.write(parseFloat("10.33") + "<br>");document.write(parseFloat("34 45 66") + "<br>");document.write(parseFloat(" 60 ") + "<br>");document.write(parseFloat("40 years") + "<br>");document.write(parseFloat("He was 40") + "<br>");