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resolution sniff for table background image 1

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boyfromoz

boyfromoz

Technical User
Joined
Feb 1, 2001
Messages
469
Location
AU
I've used a javascrtipt reolution sniff to load a particular image depending on resolution.

See below

<SCRIPT LANGUAGE=&quot;JavaScript1.2&quot;>

if (screen.height >= 768 && screen.width >= 1024) {
document.write(&quot;<img src='webimages/tableopener/largeopen.gif' width=900 height=380 border=0>&quot;);
}
else {
if (screen.height == 600 && screen.width == 800) {
document.write(&quot;<img src='webimages/tableopener/mediumopen.gif' width=700 height=289 border=0>&quot;);
}
else {
document.write(&quot;<img src='webimages/tableopener/smallopen.gif' width=550 height=222 border=0>&quot;);
}
}
// End -->
</script>

Can this be modified somehow so it can be used to set the background image of a table cell, depending on the resolution?

 
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Wrap your script code into some function:

function writeBgr() {

if (screen.height >= 768 && screen.width >= 1024) {
document.write(&quot;<td background='webimages/tableopener/largeopen.gif'>);
}
else {

. . .
document.write(&quot;<td background='webimages/tableopener/smallopen.gif'>);
. . .
}


Then call it like this:

. . .
<tr>
<script>writeBgr();<script>cell content</td>
<td>another cell</td>
</tr>
. . .

The highlighted part will be substituted by this:
<td background=&quot;script_selected_image&quot;>
 
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ta

figured as much, my avascript is limited to cut and apste, + manipualte a bit, so give given me the sytax to write in now.

Good show.

 
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Ahh... No... Can't get it it to work, keep getting sytnax errors. Even tried simplifying it by taking out the function as shown below

<!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.01 Transitional//EN&quot;>
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=iso-8859-1&quot;>
</head>

<body>
<p>&nbsp;</p>
<table width=&quot;100%&quot; border=&quot;0&quot; cellspacing=&quot;0&quot; cellpadding=&quot;0&quot;>
<tr>
<SCRIPT>
if (screen.width>=835){
document.write(&quot;<td background='webimages/backgrounds/homelarge.jpg'>&quot;);
}
if {screen.width>=740 & w<835){
document.write(&quot;<td background='webimages/backgrounds/homemedium.gif'>&quot;);
}
if {screen.width<740){
document.write(&quot;<td background='webimages/backgrounds/homemedium.gif'>&quot;);
}
}
// End -->
</script><p>sdfsdfsdf</p>
<p>sdfsdfsdf</p></td>
</tr>
</table>
<p>&nbsp;</p>
</body>
</html>

I can't figure out what I have done wrong?
 
Upvote 0 Downvote
Correct all your errors:

if {screen.width>=740 & w<835){

& should be &&
What is w? It is not defined anywhere.

That's what I found right now, but there are probably more.
 
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