JS代碼：
function s20(){ var data=["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"]; for(var j=0;j<500;j++){ //500為想要產生的行數var result="";for(var i=0;i<20;i++){ //產生20位就使i<20r=Math.floor(Math.random()*16); //16為數組裡面數據的數量，目的是以此當下標取數組data裡的值！ result+=data[r]; //輸出20次隨機數的同時，讓rrr加20次，就是20位的隨機字符串了。 } document.write(result); document.write("<br/>"); } }完整html代碼：
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script type="text/javascript"> function s20(){ var data=["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"]; for(var j=0;j<500;j++){ var result=""; for(var i=0;i<20;i++){ r=Math.floor(Math.random()*16);result+=data[r]; } document.write(result); document.write("<br/>"); } } </script> </head> <body> <input type="button" onclick="s20()" value="產生隨機數"> </body> </html>