复制代码 代码如下:

<script type=\"text/javascript\">
var format = function (number, form) {
    var forms = form.split(\'.\'), number = \'\' + number, numbers = number.split(\'.\')
        , leftnumber = numbers[0].split(\'\')
        , exec = function (lastMatch) {
            if (lastMatch == \'0\' || lastMatch == \'#\') {
                if (leftnumber.length) {
                    return leftnumber.pop();
                } else if (lastMatch == \'0\') {
                    return lastMatch;
                } else {
                    return \'\';
                }
            } else {
                return lastMatch;
            }
    }, string

    string = forms[0].split(\'\').reverse().join(\'\').replace(/./g, exec).split(\'\').reverse().join(\'\');
    string = leftnumber.join(\'\') + string;

    if (forms[1] && forms[1].length) {
        leftnumber = (numbers[1] && numbers[1].length) ? numbers[1].split(\'\').reverse() : [];
        string += \'.\' + forms[1].replace(/./g, exec);
    }
    return string.replace(//.$/, \'\');
};
alert(format(123, \'#.00\'))                         //输出   123.00
alert(format(123, \'0.##\'))                         //输出   123
alert(format(123, \'0000.00 \'))                     //输出   0123.00
alert(format(123456, \'###,###.00\'))                //输出   123,456.00
</script>