JavaScript random numbers and advanced applications with vbscript(asp) random number summary_javascript skills

1. It is the javascript random number function Math.random()
Generate a random number in a specified range
The Math.random() method has no parameters and returns a random number between 0 and 1. If To generate a random
number between 0~n, you can use the following format:

Math.floor(Math.random()*n)
To generate a random number between m~n Random numbers can be used:
Math.floor(Math.random()*n) m

The following is the application:

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javascript Random Number Advanced Application

①Since the creation of JavaScript, many browsers have built-in random number generation methods. For example:
var number = Math.random();
This method produces a floating point number between 0 and 1.
② Random numbers can also be generated based on time. For example:
var now=new Date();
var number = now.getSeconds();
This will produce an integer from 0 to 59 based on the current time.
var now=new Date();
var number = now.getSeconds()C;
This will produce an integer from 0 to 42 based on the current time.
③Here is an excellent random number generator program that can be used in many fields.

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The code is as follows:

2. vbscript (asp) random number
vbs generates random numbers
A random number without a specified range

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The code is as follows:

Function GetRandomize(numstr)
Randomize
GetRandomize = Int((numstr * Rnd) 1)
End Function

Generate a random number in the specified range

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The code is as follows:

Function MyRnd(NumMin,NumMax)
Randomize
MyRnd = Int(Rnd * (NumMax - NumMin 1)) NumMin
End Function

Here are some example codes for js random numbers

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The code is as follows:

<script> <br>//Declare a random number variable, the default is 1 <br>var GetRandomn = 1; <br>//Function to get a value in a random range<br>function GetRandom(n){GetRandomn=Math.floor(Math.random()*n 1)} <br>//Start calling and get a 1 -100 random number<br>GetRandom("100"); <br>//Output view<br>document.write(GetRandomn) <br></script>

Is it quite concise? What about the code? GetRandomn is a random number variable and can be called at will.
Let’s take a random display special effect code:
<script> <br>//Start now, first get a random number from 1 to 3<br>GetRandom("3"); <br>/ /Call items that match random numbers <br>switch(GetRandomn){ <br>case 1: <br>document.write("When the random number is 1, display the script home") <br>break; <br>case 2: <br>document.write("When the random number is 2, www.jb51.net is displayed") <br>break; <br>} <br></script>

Demo code:

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If you need to introduce external Js, you need to refresh to execute ]<script> var GetRandomn = 1; function GetRandom(n){GetRandomn=Math.floor(Math.random()*n+1)} GetRandom("2"); switch(GetRandomn){ case 1: document.write("当随机数为1则显示脚本之家") break; case 2: document.write("当随机数为2则显示www.jb51.net") break; } </script>