function selectFrom(lowerValue, upperValue) { var choices = upperValue - lowerValue + 1; return Math.floor(Math.random() * choices + lowerValue); } var num = selectFrom(2, 10); alert(num);
zdfjf 2016-08-31 11:44 原文
function selectFrom(lowerValue, upperValue) { var choices = upperValue - lowerValue + 1; return Math.floor(Math.random() * choices + lowerValue); } var num = selectFrom(2, 10); alert(num);