<script> var aa="20.6688"; var bb="10.5987"; var cc=Number(aa)+Number(bb) function Number.prototype.toFixed2(decimalNum){ var multiplyValue=Math.pow(10,parseInt(decimalNum)); return (Math.round(multiplyValue*this))/multiplyValue; } alert(cc.toFixed(4)) alert(cc.toFixed2(3)) </script>
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2007-08-21 19:02小兔快跑
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