js生成一个上限跟下限的随机数
function sj() { //x上限,y下限 var x = 2000; var y = 1800; var rand = parseInt(Math.random() * (x - y + 1) + y); console.log(rand); } $('#date').click(function() { sj(); });
<script type="text/javascript"> /*随机数*/ function GetRandomNum(Min,Max) { var Range = Max - Min; var Rand = Math.random(); return(Min + Math.round(Rand * Range)); } var numR = GetRandomNum(3000,6000); $(document).ready(function() { document.getElementById("gzl").innerHTML=numR; }); </script>
<script type="text/javascript">document.write(Math.ceil(Math.random()*(500-100)+300));</script>