JavaScript 获取任一float型小数点后两位的小数

function get(){ var s = 22.127456 + ""; var str = s.substring(0,s.indexOf(".") + 3); alert(str); }

function get(){ var a = "23.456322"; var aNew; var re = /([0-9]+/.[0-9]{2})[0-9]*/; aNew = a.replace(re,"$1"); alert(aNew); }

function get(){ var num=22.127456; alert( Math.round(num*100)/100); }

function get(){ var num = new Number(13.37); num = num.toFixed(2);//2为要获取小数后的位数 会自动四舍五入 alert(num); }