JavaScript - 逗号为千位分隔符

Question

你能帮助我改变那个变量，使逗号成为千位分隔符吗？

var number1 = 123456789;
$(function(){
    document.getElementById("test").innerHTML("Var number1 is: " + number1); //i want that to display with commas
}

我不理解其他问题的答案。感谢

Answer 1

你可以在这里看一些答案：

http://www.queness.com/post/9806/5-missing-javascript-number-format-functions

但是这里是同一页面的代码：

function CommaFormatted(amount) {
    var delimiter = ","; // replace comma if desired
    amount = new String(amount);
    var a = amount.split('.',2)
    var d = a[1];
    var i = parseInt(a[0]);
    if(isNaN(i)) { return ''; }
    var minus = '';
    if(i < 0) { minus = '-'; }
    i = Math.abs(i);
    var n = new String(i);
    var a = [];
    while(n.length > 3)
    {
        var nn = n.substr(n.length-3);
        a.unshift(nn);
        n = n.substr(0,n.length-3);
    }
    if(n.length > 0) { a.unshift(n); }
    n = a.join(delimiter);
    if(d.length < 1) { amount = n; }
    else { amount = n + '.' + d; }
    amount = minus + amount;
    return amount;
}

/**
*   Usage:  CommaFormatted(12345678);
*   result: 12,345,678
**/