Javascripts - Auto refresh with random number

Question

I want to generate random number for refresh page

How to set math.random between 20 sec until 50 sec?

My Javascript code looks like this:

var number = Math.random() * 50;
var sec = number - (number % 1) + 20;
var url = "http://example.org";

if (sec == 20 || sec == 30 || sec == 40 || sec == 50)

{
    setTimeout(function() { window.location = url } , sec  * 1000 );
}

Btw you can reduce the length of th if query. Using `if ((sec % 10) == 0)` — Reporter, Nov 19 '13 at 12:05

score 1 · Accepted Answer · edited May 23 '17 at 12:29

1

Based on this a suggest following statement:

var sec = Math.floor(Math.random() * (50 - 20) + 20);

I tested it with following script:

<script>
a = 20;
b = 50;
for (i = 0; i < 20; i++)
{
    alert(Math.floor(Math.random() * (b - a) + a));
}
</script>

and it has never generated a number lower than 20 and higher than 50.

edited May 23 '17 at 12:29

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answered Nov 19 '13 at 11:56

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Javascripts - Auto refresh with random number

1 Answers1