javascript中如何使浮点数保留固定的小数位数？

[AdamsLee]

比如10/3得到的数字保留2为小数位数得3.33

[shyslysky]

<script>
var test=8.8888
Number.prototype.fixed=function(n){
with(Math)return round(Number(this)*pow(10,n))/pow(10,n)
}
alert(test.fixed(2))
alert(test.toFixed(2))//ie5.5+
</script>

[shyslysky]

<script language="JavaScript">

var test=10/3;
Number.prototype.fixed=function(n){
with(Math)return round(Number(this)*pow(10,n))/pow(10,n)
}
alert(test.fixed(2))
alert(test.toFixed(2))//ie5.5+

</script>

[cloudchen]

加个判断

<SCRIPT LANGUAGE="JavaScript">
if(!Number.prototype.toFixed) {
Number.prototype.toFixed = function(n) {
with(Math) return round(Number(this)*pow(10,n))/pow(10,n)
}
}
alert(8.88888.toFixed(2))
</SCRIPT>