# Random Number Generating

Aug 27, 2006

I run a random number generating service for a RPG message board I go to, and my website generates only numbers from 1-100. How could I script this so that the user can get random numbers between 1-X?

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## Generating Random Number

Feb 28, 2006

In the forum, it usually talked about generating a number between 1 or 0 to that certain value using something like Math.round(Math.random() * 200); or Math.floor(Math.random() * 200);

But what do you do if you want to generate a number between 201 and 400.

## Generating A Random Between 2 Numbers?

May 11, 2010

I'll get to the point, I'm a noob I'm using greasemonkey for a certain website. Basically, I'm using gm to refresh the page after a certain time, I was however wondering, If I can set it to a random number between 2 specific times?

The code I'm using atm is setTimeout(function() { document.location.reload(); } , 10000); I know I have to use math.random, well, I think I do. But I'm not sure how to do it between 2 certain times? So to summarise, I'm trying to refresh a page at any given random time between say 5-10 minutes.

## Generating Random Images With No Repeats?

Jan 22, 2009

I want a certain amount of image spots to show a certain set of images (specifically 8) in a random order every time the page is refreshed. I do not want the images to be repeated, however. The solution I came up with was to create an array and generate a number one to eight and then compare that number to the numbers previously in the array, and if it matched one that was previously generated, to generate a new number and then compare it. This continues until i have an array of the numbers 1-8 in a random order.

var imgs=new Array(8);
for(i in imgs)
{
function generate()
{
return Math.floor(1+Math.random()*8);

[Code]...

This does not strike me as the most efficient way to go about this. If someone has a better solution,

## Resolved Having Generating Random Text?

Aug 9, 2009

New to JS, and not too good at it. Trying to take some prewritten code and add script that displays some random text. Having trouble with assignment. Instructions are to replace a section of the file I am given with a script element. In the script element I am suppose to declare a variable named tipNum equal to a random integer between 1 and 10 returned by the randInt() function (which I made and have shown below). Then I am suppose to use a series of document.write() methods to write the following HTML code into the page:

<h1>Random Tip<br />title</h1>
<p>tip</p>

(Where "title" is the title of the random text as generated by the tipTitle() function from a external file, and which I did not make; and "tip" is the text of the random tip as genereated by the tipText() function, which is also from the external file, and not made by me) My code for the randInt() function is

function randInt(lower, upper) {
var size = ++(upper - lower);
var randValue = Math.floor(lower + size*Math.random());
}

The script I made to display the HTML code is

[Code]...

I am getting nothing on my page where the random text should be.

## Generating Random Image Using RandomOneOf?

May 18, 2011

For a computer science class homework assignment I need to create a page where an image changes randomly when a button is clicked. This is what I have so far, nothing happens when button is clicked. I need the button to randomly return one of the five images described in the emotions function. Please help, I sorely need it.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Picture Fun </title>
<style type="text/css">
body {font-family: verdana; margin-top: 1in}

[Code]...

## Add The Value Of A Random Number To Another Value?

May 22, 2011

I can generate a random number between 1 and 9,

( var rand_no = Math.floor( 1 + Math.random() * 9 ); )

but I want to add that random number to a value that is enterred into an inputbox and get a total. How can I do this using Javascript and put the result into a hidden field. I will also need to use that same random number in another place on another form .

## Random Number But Only Once?

Aug 31, 2011

I'm trying to apply something in my forums, where a member could post something let's say:"Hi, I am number 1, 6"And what would happen is that, a number from 1 to 6 would be the content, for example, it would be:"Hi, I am number 3"But if you refresh the page, it would still be the same number. Like it won't be randomized again.So how do I make a javascript/html code that would make a one time number randomizer.

## Random Number - Multiple Of 10, Between 0 And 470?

May 6, 2011

How would I generate a random number between 0 and 470 at multiples of 10 including 0 and 470?

## Regenerating A Random Number?

Apr 23, 2009

I set myself the task of creating a button which, when pressed, switches the background color randomly. It seems to work well enough but the random number it works from only generates once at page load.As a workaround, I added a second 'Reset Page' button, but I really want just one button that switches the page color every time you prod it. Any ideas how to reset the random number to achieve this?Here's the code.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="EN" dir="ltr" xmlns="http://www.w3.org/1999/xhtml">

[code]....

## How To Fill Random Number

Jun 19, 2009

say i have:

document.writeln("0")
document.writeln("1")
document.writeln("2")

[code]....

## Random Number Within Array II

Jul 16, 2009

In http:www.dreaminco...wtopic51264.htm a code was proposed for generating a random number within an array and then printing it into the html document using document.write.Is it possible to go one step ahead and feeding the result into an html href function? [code]is the random array member generated by the javascript.

## Make A Random Number Between 1 And 1,000?

Jun 30, 2010

I am trying to make a random number between 1 and 1,000. I have a code that seems to work correctly, but I don't completely understand it and after looking online I think it might be wrong. Code: var rnd = Math.floor(Math.random()*999)

## Random Number Generation Different For IEs?

May 10, 2009

All the numbers should match. It's not working right in any version of IE I test it in (6, 7 and 8). I'm also using jQuery, fyi.When you click the button to stop the numbers, I'm setting a variable named winner to a number (3, 4 or 5). Right now, I have it set to 5. This number determines how many of the slots match:[code]I'm then generating a random number (0-8) to base all the other numbers off of . Three numbers will always match, so I'm setting two more variables to match that random number.[code]Then I do some conditionals to check the value of winner. If it's 4, I set the 4th number to random number, then generate a random number for the 5th spot while it doesn't equal randomnum. I do something similar if winner is set to 5.[code]The goto trigger sends the scroll to the specified index according to slotnum(1-5).I'm waiting to hear back from the plugin developer to see if it's something to do with that.However, I just want to make sure my logic in generating those numbers is sound. It works perfectly in FF, Opera and Chrome but (surprise!) not in any of the IEs (tested in 6, 7 and 8).

## Button Prints Out Random Number

Sep 23, 2011

I am trying to make it so that when you press a button it prints out a random number. This is what I currently have:

Code:
<script type="text/javascript">
function randomnumber(randomForm){
var x=Math.floor(Math.random()*11);
document.write(x);
}
</script>
<FORM>
<INPUT type="button" value="Print Number" name="button1" onClick="randomnumber(this.form)">
</FORM>

When I click on the button it just clears all the text from the page and clears the bgcolor. A random number then appears at the top left corner. I am trying to make it so that when I press the button it prints out a random number just above or below the button. Is this possible? if so how do you set it up?

## Generate Random Number Within A Range?

Jun 30, 2009

I am trying to generate random number within a range. My code at the moment is

Code:

var uppermax = 100; var uppermin = 10; var upperdiff = uppermax - uppermin; var lowermax = 10; var lowermin = 0; var lowerdiff = lowermax - lowermin; var rand = Math.floor(upperdiff + 1) * Math.random() + uppermin; alert(rand);

I know math.floor is supposed to round down to the nearest integer, but the generator is still coming back with a float.

## Create Random Number Between 1 - 50 With Decimals?

May 24, 2011

How would I go about creating a random number between 1-50 that COULD include whole numbers, decimals to the tenth, hundredth and the thousandth place?
Ex) 2.145, 3, 5.8, 41.002, 10.12, 7, 18.023, 33.2

Also, if the only way to do it is to put trailing zeros to the thousandth place that's fine as well
Ex) 2.145, 3.00, 5.800, 41.002, 10.120, 7.00, 18.023, 33.200

## Random Number Changes Twice While Posting Form?

Aug 4, 2011

I have a form and select menus. I am posting it ajax post method and loading the same page with load method as you see in codes. There is a random number genarator. I want to change this random number once a click submit. If i do not load the same page this number does not change. Therefore I use both post and load methods like in demo. However when i do like this there is a problem which is random number have been generated twice somtimes. If you click submit button successively you will see that the number on left top corner sometimes changes twice a click. Why it is so and how can i correct it.

[Code]...

## Random Number Return To Same On Back

Feb 8, 2008

I am trying to generate a random number each a person visits a page but would like that number to not change if they leave the page and use their browser back button to return. My code is below and the problem I have is that upon browser back the value in the if statement is still "Null" despite having been changed the first time the script ran.....

## Display A Random Number Using InnerHTML?

Oct 15, 2011

I trying to display a random number using innerHTML

Here's my code:

HTML Code:
<html>
<head>
<script language="JavaScript">

[Code].....

## Getting Random Number To Show Up In Text Box?

Dec 4, 2010

I cant get a random number to show up in my text box.PHP Code:

function Random() {
var Random = Math.floor(Math.random() * 10);
}

[code]....

## Random Number Generator Returning NaN's?

Mar 25, 2011

the script is supposed to allow the user to enter a minimum and maximum value and then enter the number of random numbers to generate between the min and max.

then it is supposed to floor these numbers and post the in a single column table. my script is writing the table correctly but the numbers arent coming through

Code:
<table border = "2">
<script type="text/javascript">
var min = window.prompt("Enter the 1st number","");

[Code]....

## Do Action Based On Random Number

May 5, 2009

The following code is supposed to provide a different alert message when a page is loaded, based on a random number generated on load. Can anybody see what is probably a very obvious problem that I just can't see?[code]

## Non-repeat Random Number Generator?

Aug 14, 2011

I've looked everywhere for a random number generator which doesn't repeat. Tried loads and none have seemed to work.I'm making a quiz, 5 questions so far.This button, in html, generates the next random Q:But I need a random generator which fires them off only once. Anyone have suggestions for a non-repeating random number gen which will work? Even the one now seems to have some slight error associated with it. The one's ive tried so far haven't worked..

## Random Number Into A Form Field

Aug 25, 2011

i'm trying to write a code that generates a random number between 1 and 9999 on page load, concatenates it with "pwn" at the start, and adds it to a disabled form text input box. this is the code i have below, but it's not working at all.[code]

## Configure Random Number Generator To Only Execute Once?

Feb 20, 2011

I scripted a javascript guessing game and I am not sure how I can configure the random number generator to only generate one number and then stop.code...

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