Randomly generated keys

Do project to use this thing, so Baidu its method, record it. Code to serve.
Randomly generate n-bit numbers:

function randomnum (n) {     //N is the number of digits generated by    var t= ';       for (var i=0;i<n;i++) {         T+=math.floor (math.random () *10);         }      return t;     }     Alert (Randomnum (6));

Randomly generate N-letters

function getrandomstring (len) {      var//  default removes easily confusing characters ooll,9gq,vv,uu,i1       var maxpos = chars.length;       var pwd = ';        for (i = 0; i < len; i++) {          + = Chars.charat (Math.floor (Math.random () * maxpos))              ;      } return pwd;  }      Alert (getrandomstring (3));

Chars.charat is the character that selects the number of index numbers. Math.floor () rounding down Math.random () takes 0-1 random numbers

The climax comes, the letters plus the digital stitching is

var pwd = getrandomstring (3); var t = randomnum (6); var fdnm = pwd + t;

Randomly generated keys