<SCRIPT LANGUAGE="JavaScript">
<!--
var num =20/3
var dot_length = 2 //小数点位数
Lnum = Math.pow(10,dot_length)
nnum = Math.round(num*Lnum)/Lnum
alert(num+"约等于"+nnum)
//-->
</SCRIPT>
<!--
var num =20/3
var dot_length = 2 //小数点位数
Lnum = Math.pow(10,dot_length)
nnum = Math.round(num*Lnum)/Lnum
alert(num+"约等于"+nnum)
//-->
</SCRIPT>
alert((5/3).toFixed(2))
</script>