22家奶粉厂家69批次产品检出三聚氰胺(名单)
查看网页更新日期的JS代码
2008/09/19 09:31 | by 1.只取小数点后两位：
<script>
alert(("156782.1234").replace(/^(.*\..{2}).*$/,"$1"));
</script>
2.取小数点后的位数：
<script>
alert(("156782.12346").replace(/(\d*\.?)/,"").length);
</script>
3.只取小数点后两位，四舍五入：
<script>
alert(3.1415926.toFixed(3));
</script>
<script type="text/javascript">
var num = new Number(13.37);
document.write (num.toFixed(1))
</script>
<script>
alert(("156782.1234").replace(/^(.*\..{2}).*$/,"$1"));
</script>
2.取小数点后的位数：
<script>
alert(("156782.12346").replace(/(\d*\.?)/,"").length);
</script>
3.只取小数点后两位，四舍五入：
<script>
alert(3.1415926.toFixed(3));
</script>
<script type="text/javascript">
var num = new Number(13.37);
document.write (num.toFixed(1))
</script>
