<!doctype html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Document</title> </head> <body> <input type="text" id="text"><input type="button" value="提交" onclick="submit()"> <script> function submit(){ var text = document.getElementById("text").value; var arr = fn(text); if(arr.length>0){ alert(arr); } } function fn(n) { var min = 5;var max = 39; //随机数范围 var pattern = /^[1-9]$|^[1-3][0-5]$/;//验证5-39的数字 var arr = [];var temp = []; if (pattern.test(n)) { arr = arr.range(min, max); console.log(arr); for (var int = 0; int < n; int++) { temp.push(arr.splice(parseInt(Math.random() * (arr.length-1)), 1).toString()); } } else { alert("输入不合法，请输入不大于" + (max - min + 1) + "的正整数！"); } return temp; } Array.prototype.range = function(start, end) {//生成指定范围的数组 var _self = this; var length = end - start + 1; var step = start - 1; return Array.apply(null, { length : length }).map(function(v, i) { step++; return step; }); } </script> </body> </html>