//code from http://caibaojian.com/js-random-string.html function makeid() { var text = ""; var possible = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789"; for( var i=0; i < 5; i++ ) text += possible.charat(math.floor(math.random() * possible.length)); return text; }
第二种：不需要输入字符集合
function randomstring(l){ var s= ''; var randomchar=function(){ var n= math.floor(math.random()*62); if(n<10) return n; //1-10 if(n<36) return string.fromcharcode(n+55); //a-z return string.fromcharcode(n+61); //a-z } while(s.length< l) s+= randomchar(); return s; } alert(randomstring(5))
第三种：支持自定义字符长度和特征字符集合
function randomstring(len, charset) { charset = charset || 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789'; var randomstring = ''; for (var i = 0; i < len; i++) { var randompoz = math.floor(math.random() * charset.length); randomstring += charset.substring(randompoz,randompoz+1); } return randomstring; }
call with default charset [a-za-z0-9] or send in your own:
var randomvalue = randomstring(5); var randomvalue = randomstring(5, 'pickcharsfromthisset');
演示截图
以上就是javascript创建含数字字母的随机字符串的三种方法总结，有需要的可以参考学习。
更多javascript创建含数字字母的随机字符串。