JS retains 2 decimal places after the decimal point

1. The dumbest way ... [I'll do what I do ...]

function Get ()
{
var s = 22.127456 + "";
var str = s.substring (0,s.indexof (".") + 3);
alert (str);
}

2. Regular expression effect is good

<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, "$");
alert (anew);
}
</script>

3. He is more clever ...

<script>
var num=22.127456;
Alert (Math.Round (num*100)/100);
</script>

4. Friends who will use new things .... But we need ie5.5+ to support it.

<script>
var num=22.127456;
Alert (num.tofixed (2));
</script>
from:http://xinlingwuyu.javaeye.com/blog/175931

JS retains 2 decimal places after the decimal point