function getFloatNumber(num ) {    num += '' ;    num = num.replace (/[^0-9|\.]/g , '');    if (/^0+/ )        num = num.replace (/^0+/ , '' );    if (!/\./.test (num) )        num += '.00';    if (/^\./.test (num ) )        num = '0' + num;    num += '00';    num = num.match (/\d+\.\d{2}/ )[0];    return num;};console.log(getFloatNumber(1.02656));//1.02 没有四舍五入。