[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Random

Posted on 1998-10-28
7
Medium Priority
?
274 Views
Last Modified: 2010-04-09
I want to be able to use a javascript to display a random image out of a set of 4 on my web page. Anyone know the code for this?
0
Comment
Question by:Bishma
  • 2
  • 2
  • 2
  • +1
7 Comments
 
LVL 10

Expert Comment

by:MasseyM
ID: 1839209
Here you go:

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin
numpics = 4
day = new Date()
z = day.getTime()
y = (z - (parseInt(z/1000,10) * 1000))/10
x = parseInt(y/100*nummidi,10) + 1
if (x == (1))
pic=("pic1.gif")
if (x == (2))
pic=("pic2.gif")
if (x == (3))
pic=("pic3.gif")
if (x == (4))
pic=("pic4.gif")
document.write('<IMG SRC= ' + pic + ' >')
// End -->
</SCRIPT>

0
 
LVL 4

Expert Comment

by:martinag
ID: 1839210
If your images are named "pic1.gif" to "pic4.gif" this:
if (x == (1))
pic=("pic1.gif")
if (x == (2))
pic=("pic2.gif")
if (x == (3))
pic=("pic3.gif")
if (x == (4))
pic=("pic4.gif")
Can be replace with this:
pic = "pic" + x + ".gif";

Martin
0
 

Author Comment

by:Bishma
ID: 1839211
It didn't work. Is there a line that should be in the body to accompany this? Keep in mind I know very little about javascript
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
LVL 2

Accepted Solution

by:
Grdv earned 180 total points
ID: 1839212
<html>
<head>
<script language="javascript">
function rand(n){
 var now = new Date();
 var seed = now.getTime() % 0xffffffff;
 seed = (0x015a4e35 * seed) % 0x7fffffff;
 return (seed >> 16) % n;
}

function splash(){
 if (document.images) document.images["splash"].src = "img/splash" + rand(4) + ".gif";
}
</script>
<title>Splash Screen Page</title>
</head>
<body bgcolor="#cccc66" topmargin="0" leftmargin="0" marginwidth="0" marginheight="0" onLoad="splash()">
<table border="0" cellspacing="0" cellpadding="0" width="100%" height="100%">
 <tr>
  <td align="center" valign="middle" colspan="2">
    <a href="about.html">
<img src="img/bl.gif" alt="splashpicture" width="370" height="370" border="0" name="splash"></a>
  </td>
 </tr>
</table>
</body>
</html>
this is very simple... all you do is to place your pictures in a subdir, called img and then name them:
splash0.gif,splash1.gif,splash2.gif,splash3.gif

and then this image tag is the keytag:
<img src="img/bl.gif" alt="splashpicture" width="370" height="370" border="0" name="splash">
first of all the src= points to a blank image, just to have an image then the name "splash" is the one used of the javascript function splash()

if (document.images) document.images["splash"].src = "img/splash" + rand(4) + ".gif";
checks if there is possible to change the image, if it is, then change the image named "splash" into the random splash screen...

hope that helped...

//Grdv
0
 

Author Comment

by:Bishma
ID: 1839213
Not exactly what I wanted but it only took 2 small changes to get it to work. Thanks.
0
 
LVL 10

Expert Comment

by:MasseyM
ID: 1839214
That is exactly what mine did!
0
 
LVL 2

Expert Comment

by:Grdv
ID: 1839215
no it's not.... you're using this line:

      document.write('<IMG SRC= ' + pic + ' >')

while I'm using dynamic images, then which one of them's best can be discussed...

//Grdv
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
Q&A with Course Creator, Mark Lassoff, on the importance of HTML5 in the career of a modern-day developer.
In this tutorial viewers will learn how add a scalable full-width header using CSS3. Create a new HTML document with an internal stylesheet. Set a tiled background.:  Create a new div and name it Header. Position it with position:absolute at the top…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
Suggested Courses

873 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question