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生成从minNum到maxNum的随机数
1 <!DOCTYPE html> 2 <html> 3 ?4 ????<head> 5 ????????<meta charset="UTF-8"> 6 ????????<title></title> 7 ????????<!--1.引入jq--> 8 ????????<script src="http://code.jquery.com/jquery-1.4.1.min.js"></script> 9 ????</head>10 11 ????<body>12 ????????<!--2.html-->13 ????????<button>点我</button>14 ????</body>15 ????<script type="text/javascript">16 ????????//3.js函数和事件17 ????????$("button").click(function(){18 ????????????var n = randomNum(1,5)19 ????????????console.log(n)20 ????????})21 ????????//生成从minNum到maxNum的随机数22 ????????function randomNum(minNum, maxNum) {23 ????????????switch(arguments.length) {24 ????????????????case 1:25 ????????????????????return parseInt(Math.random() * minNum + 1, 10);26 ????????????????????break;27 ????????????????case 2:28 ????????????????????return parseInt(Math.random() * (maxNum - minNum + 1) + minNum, 10);29 ????????????????????break;30 ????????????????default:31 ????????????????????return 0;32 ????????????????????break;33 ????????????}34 ????????}35 ????</script>36 37 </html>js_开发小技巧记录（一）
原文地址：https://www.cnblogs.com/wush-1215/p/8379178.html