js封存2位小数

js保留2位小数

var ratioNow222 = (money-fastPriceOrRatio)/money;var ratioNow = Number(ratioNow222.toFixed(2));if( ratioNow > commissionMax ){textFastPriceOrRatio.html("<font color='red'>价格设置不能超出佣金比率上限"+commissionMax+"！</font>");checkFastPriceOrRatio = false;return;}if( ratioNow < commissionMin ){textFastPriceOrRatio.html("<font color='red'>价格设置不能低于佣金比率下限"+commissionMin+"！</font>");checkFastPriceOrRatio = false;return;}

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###主要使用了Number(ratioNow222.toFixed(2));? 保留2位小数，转换成Number

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###其他方法：

<script>    /*四舍五入*/var num=22.127456;alert( Math.round(num*100)/100);/*四舍五入*/var num=22.127456;alert( num.toFixed(2));/*非四舍五入，直接取两位*/var s = 22.127456 + "";    var str = s.substring(0,s.indexOf(".") + 3);    alert(str);/*非四舍五入，直接取两位*/    var a = "23.456322";    var aNew;    var re = /([0-9]+\.[0-9]{2})[0-9]*/;    aNew = a.replace(re,"$1");    alert(aNew);</script>

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