網頁設計 : [分享]利用javascript達到數字千分位效果

<script language="JavaScript">
<!--
n="1279834847944074100465236.33"
// re=/(\d{1,3})(?=(\d{3})+(?:$|\.))/g
re=/(\d{1,3})(?=(\d{3})+(?:$|\D))/g
n1=n.replace(re,"$1,")
alert(n+"\r\n"+n1)
//-->
</script>

<script>
function FormatNumber(n) {
    n += "";
    var arr = n.split(".");
    var re = /(\d{1,3})(?=(\d{3})+$)/g;
    return arr[0].replace(re,"$1,") + (arr.length == 2 ? "."+arr[1] : "");
}

//test
document.write(FormatNumber(1234567) + "<br>");
document.write(FormatNumber("12345678.12") + "<br>");
document.write(FormatNumber(123456789.1234) + "<br>");
document.write(FormatNumber(-123456.123) + "<br>");
</script>