用Javascript取float型小数点后两位,例22.127456取成22.13,如何做?
最笨的办法
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5function get(){
var s = 22.127456 + "";
var str = s.substring(0,s.indexOf(".") + 3);
alert(str);
}正则表达式效果不错
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9<script type="text/javascript">
onload = function(){
var a = "23.456322";
var aNew;
var re = /([0-9]+\.[0-9]{2})[0-9]*/;
aNew = a.replace(re,"$1");
alert(aNew);
}
</script>他就比较聪明了…..
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4<script>
var num=22.127456;
alert( Math.round(num*100)/100);
</script>
4.会用新鲜东西的朋友……. 但是需要 IE5.5+才支持。
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