四舍五入保留N位小数
<script> function tobits(flt,n){ if(parseFloat(flt) == flt){ var t = 1+new Array(n+1).join("0"); return Math.round(flt * t) / t ; }else{ return 0; } } alert(tobits(108.3383533337,2)); alert(tobits(108.3383533337,4)); alert(tobits(108.3383533337,9)); </script>