PHP开发笔记 - Powered by Discuz! Board

标题: jquery取float型小数点后两位 [打印本页]

作者: xiexie 时间: 2012-6-30 16:57 标题: jquery取float型小数点后两位

1、最直接的办法
function get(){
    var s = 22.127456 + “”;
    var str = s.substring(0,s.indexOf(“.”) + 3);
    alert(str);
}

2、正则表达式效果不错
<scrīpt type=”text/javascrīpt”>
onload = function(){
    var a = “23.456322″;
    var aNew;
    var re = /([0-9]+\.[0-9]{2})[0-9]*/;
    aNew = a.replace(re,”$1″);
    alert( aNew);
}
</scrīpt>
3.他就比较聪明了…..
<scrīpt>
var num=22.127456;
alert( Math.round(num*100)/100);
</scrīpt>
4.会用新鲜东西的朋友……. 但是需要 IE5.5+才支持。
<scrīpt>
var num=22.127456;
alert( num.toFixed(2));
</scrīpt>

欢迎光临 PHP开发笔记 (http://www.phpvi.com/)