JS generating more random string

. 1 <Script Language = "JavaScript"> 
 2  function randomString (len) {
 . 3  　　len = len || 32 ;
 . 4  　　var $ chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';     / * *** default removed confusing characters oOLl, 9gq, Vv , the Uu, I1 *** * / 
. 5  　　var maxPos = $ chars.length;
 . 6  　　var pwd = '' ;
 . 7  　　for (I = 0; I <len; I ++ ) {
 . 8  　　　　pwd + = $ chars.charAt (the Math. Floor (Math.random () * maxPos));
 . 9  　　}
 10  　　return pwd;
 . 11  }
 12 is document.write(randomString(32));
13 </script>

Call randomString method parameter len is the length of the returned random string.

JS produce several uses random numbers!

 1 <script>   
 2 function GetRandomNum(Min,Max)
 3 {   
 4 var Range = Max - Min;   
 5 var Rand = Math.random();   
 6 return(Min + Math.round(Rand * Range));   
 7 }   
 8 var num = GetRandomNum(1,10);   
 9 alert(num);   
10 </script>
11 var chars = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
12 
13 function generateMixed(n) {
14      var res = "";
15      for(var i = 0; i < n ; i ++) {
16          var id = Math.ceil(Math.random()*35);
17          res += chars[id];
18      }
19      return res;
20 }

1.Math.random (); the result is a random number between 0-1 (including 0, excluding. 1)
2.Math.floor (num); num is a parameter value to an integer portion of the function of num.
3.Math.round (num); num is a parameter value, the function result is an integer rounding num.

Math: mathematical object, mathematical calculation to provide data.
Math.random (); return 0 and 1 (including 0, not including 1) a random number.

Math.ceil (n); returns the smallest integer greater than or equal to n.
With Math.ceil (Math.random () * 10) ; when the main acquired random integer from 1 to 10, taking a very small probability 0.

Returns the value of an integer n rounded; Math.round (n).
With Math.round (Math.random ()); equalizes obtaining random integer 0 to 1.
With Math.round (Math.random () * 10) ; time, may be substantially balanced to obtain random integer from 0 to 10, wherein the probability of obtaining a minimum value of 0 and a maximum 10 less than half.

Math.floor (n); returns the largest integer less than or equal to n.
With Math.floor (Math.random () * 10) ; when the equalization can obtain random integer from 0 to 9.

generating a random string js + stamp obtaining

The default is generated JS 13, needs to pass php / 1000

 1 timestamp = timestamp/1000;
 2 <script type="text/javascript">
 3 function  randomChar(l)  {
 4 var  x="0123456789qwertyuioplkjhgfdsazxcvbnm";
 5 var  tmp="";
 6 var timestamp = new Date().getTime();
 7 for(var  i=0;i<  l;i++)  {
 8 tmp  +=  x.charAt(Math.ceil(Math.random()*100000000)%x.length);
 9 }
10 return  timestamp+tm

Original: https://www.jb51.net/article/50910.htm

JS generating more random string

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