JS中产生20位随机数以0-9为例也可以是a-z A-Z
JS代码:
functions20(){ vardata=["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"]; for(varj=0;j<500;j++){//500为想要产生的行数 varresult=""; for(vari=0;i<20;i++){//产生20位就使i<20 r=Math.floor(Math.random()*16);//16为数组里面数据的数量,目的是以此当下标取数组data里的值! result+=data[r];//输出20次随机数的同时,让rrr加20次,就是20位的随机字符串了。 } document.write(result); document.write("<br/>"); }}
完整html代码:
<html> <head> <metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/> <title></title> <scripttype="text/javascript"> functions20(){ vardata=["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"]; for(varj=0;j<500;j++){ varresult=""; for(vari=0;i<20;i++){ r=Math.floor(Math.random()*16); result+=data[r]; } document.write(result); document.write("<br/>"); }} </script> </head> <body> <inputtype="button"onclick="s20()"value="产生随机数"> </body> </html>