标签:java javascript cti io new type
1. 最笨的办法.......
function get() {
var s = 22.127456 + "";
var str = s.substring(0,s.indexOf(".") + 3);
alert(str); }
2. 正则 效果不错
<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>
3. 他就比较聪明了.....
<script> var num=22.127456; alert( Math.round(num*100)/100); </script>
4.会用新鲜东西的朋友.......
<script> var num=22.127456; alert( num.toFixed(2)); </script>
标签:java javascript cti io new type
原文地址:http://www.cnblogs.com/qiyongliang/p/3818159.html