?
Solved

Refresh automatically?

Posted on 2000-05-09
5
Medium Priority
?
249 Views
Last Modified: 2010-04-09
Hi,
I saw some homepages(forgot the URLs already) which contain some images which can refresh themselves automatically.  The most special is that only the images are changed(random image), but the whole page hadn't got reloaded.  Therefore, the visitor will not be disturbed by the refresh action of the images.

How can I achieve this?  Will "layer" help?
Thanks in advance.
PS.  Please don't suggest me to use frames.
0
Comment
Question by:nyt
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 75

Accepted Solution

by:
Michel Plungjan earned 150 total points
ID: 2791806
They use javascript:

<html>
<head>
<script>
myImageNames = new Array('image0','image1','image2','image3')
myImages = new Array();

/* preload */

if (document.images) {
   for (i=0;i<myImages.length;i++) {
      myImages[i] = new Image();
      myImages[i].src = myImageNames[i] +'.jpg';
   }
}

count = 0
function swap() {
   if (!document.images) return;
   count++;
   if (count > myImages.length) count = 0;
   document.images['banner'].src = myImages[count].src;
   setTimeout('swap()',5000);
}
</script>
</head>
<body onLoad="swap()">
<img src=image0.jpg name=banner>

Michel
0
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 2791811
If you want just one new image each time the page is loaded you need to use cookies.

Michel
0
 

Author Comment

by:nyt
ID: 2791864
I use Netscape.
The code seems not working under Netscape.  Netscape gave me this error message:
"Line 21: myImages[count] has no properties."

How can I correct this so that the code can work under both Netscape and IE?
0
 

Author Comment

by:nyt
ID: 2791887
Moreover,
I prefer not using "Preload"...since the image files are actually changing with time.  That is something like a counter, the code loads the image file in regular intervals, so that the counter image can give the most updated info.

Of course, I am not do this for a counter.  Counter is used to explain what I want.

Thanks
0
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 2791906
Bug. I just whipped it up from the top of my head...

change

if (count > myImages.length) count = 0;

to

if (count >= myImages.length) count = 0;


To not preload use this:

<html>
<head>
<script>
myImages = new Array('image0.jpg','image1.jpg','image2.jpg','image3.jpg')
count = 0
function swap() {
   if (!document.images) return;
   count++;
   if (count >= myImages.length) count = 0;
   document.images['banner'].src = myImages[count];
   setTimeout('swap()',5000);
}
</script>
</head>
<body onLoad="swap()">
<img src=image0.jpg name=banner>

Michel
0

Featured Post

Video: Liquid Web Managed WordPress Comparisons

If you run run a WordPress, you understand the potential headaches you may face when updating your plugins and themes. Do you choose to update on the fly and risk taking down your site; or do you set up a staging, keep it in sync with your live site and use that to test updates?

Question has a verified solution.

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

This is a PowerShell web interface I use to manage some task as a network administrator. Clicking an action button on the left frame will display a form in the middle frame to input some data in textboxes, process this data in PowerShell and display…
When it comes to write a Context Sensitive Help (an online help that is obtained from a specific point in state of software to provide help with that state) ,  first we need to make the file that contains all topics, which are given exclusive IDs. …
In this tutorial viewers will learn how to style a corner ribbon overlay for an image using CSS Create a new class by typing ".Ribbon":  Define the class' "display:" as "inline-block": Define its "position:" as "relative": Define its "overflow:" as …
In this tutorial viewers will learn how to embed videos in a webpage using HTML5. Ensure your DOCTYPE declaration is set to HTML5: "<!DOCTYPE html>": Use the <video> tag to insert a video. Define the src as the URL of your video; this is similar to …
Suggested Courses

770 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