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Image Reload

Posted on 2004-04-19
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Last Modified: 2008-03-17
Hello, i have the following code, it is reloading a picture every 45 seconds, the picture is cached on the server or local computer somehow, and i need this to refresh every time also.

<head>
<meta http-equiv="refresh" content="45">
<META HTTP-EQUIV="cache-control" CONTENT="no-cache">
<META http-equiv="Expires" content="0">
<title></title>
</head>

<body topmargin="0" leftmargin="0" style="background-color: #000000">

<img src="http://www.ktvq.com/q2news/public_html/webcam/webcam.jpg" width="705" height="533">
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Question by:GBLX-Bill
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9 Comments
 
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Accepted Solution

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knightEknight earned 500 total points
ID: 10859254
<body topmargin="0" leftmargin="0" style="background-color: #000000"
  onload="document.images['webcam'].src='http://www.ktvq.com/q2news/public_html/webcam/webcam.jpg'+Math.random();" >

<img name="webcam"width="705" height="533" />
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LVL 33

Expert Comment

by:knightEknight
ID: 10859259
oops, typo.  Add a "?" after .jpg:

onload="document.images['webcam'].src='http://www.ktvq.com/q2news/public_html/webcam/webcam.jpg?'+Math.random();"
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LVL 33

Expert Comment

by:knightEknight
ID: 10859266
also add a space after the image name and before width:

<img name="webcam" width="705" height="533" />
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LVL 33

Expert Comment

by:knightEknight
ID: 10859283
adding a random number to the image URL will force the browser to reload it instead of getting it from the cache.
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Expert Comment

by:knightEknight
ID: 10859335
another way to do this -- if you are using a server script instead of just plain HTML:

  <meta http-equiv="refresh" content="45, url=http://www.yourserver.com/yourpage.asp?<%=rnd()%>" />

or

  <meta http-equiv="refresh" content="45, url=http://www.yourserver.com/yourpage.asp?<%=Math.random()%>" />

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Author Comment

by:GBLX-Bill
ID: 10859629
so for the top example, im confused, can you re-list the final?
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LVL 33

Expert Comment

by:knightEknight
ID: 10859749
sure ... just make sure you name the image consistently in the name and in the onload handler:


<body topmargin="0" leftmargin="0" style="background-color: #000000"
  onload="document.images['webcam'].src='http://www.ktvq.com/q2news/public_html/webcam/webcam.jpg?'+Math.random();" >

<img name="webcam" width="705" height="533" />
0
 
LVL 33

Expert Comment

by:knightEknight
ID: 10859759
(I named it "webcam" but you can name it what ever you want, just reference it consistently in the script.:)
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LVL 33

Expert Comment

by:knightEknight
ID: 10860429
another option is to use the current system time:

onload="document.images['webcam'].src='http://www.ktvq.com/q2news/public_html/webcam/webcam.jpg?'+new Date().getTime();"
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