js百分比

<script>

function percentage(ary, lth) {

var s = '';

for (var i = 0; i < ary.length; i++) with (Math)

s += round(parseInt(ary[i]) / parseInt(eval(ary.join('+'))) * 100 * pow(10, lth)) / pow(10, lth) + '%;';

return s.split(';');

}

alert(percentage([1250, 50, 3, 25, 612], 3).join('\n'));

var s1 = Math.round(7 / 30 * 100 * Math.pow(10, 2)) / Math.pow(10, 2) + '%';

alert(s1);

</script>