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Rollover JavaScript not working in Safari and Chrome

Posted on 2011-09-07
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Last Modified: 2012-05-12
I have a page that displays a thumbnail image when you roll over a link.


The JavaScript routines for rollove rand rollout are simply:

<script type="text/javascript" language="javascript">

function showImage(image) {
    image.style.visibility="visible";
}
   
function hideImage(image) {
    image.style.visibility="hidden";  
}
 </script>

And the HTML is:

<img id="sib_1_tn" class="thumb" src="images/Siblings/sib_1_tn.jpg" />
<a href="sib_1.php" onmouseover="showImage(sib_1_tn)" onmouseout="hideImage(sib_1_tn)">Sibling 1 </a>
 

=================

This works fine in IE and Firefox but neither Chrome nor Safari display the thumbnail image when you roll over the link.  Does anyone run an idea what the problem might be?

Thanks for any suggestions.

Steve
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Question by:steva
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Expert Comment

by:leakim971
ID: 36499984
put the ID of the image inside simple quote :

onmouseover="showImage('sib_1_tn')" onmouseout="hideImage('sib_1_tn')
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LVL 82

Expert Comment

by:leakim971
ID: 36499995
<img id="sib_1_tn" class="thumb" src="images/Siblings/sib_1_tn.jpg" />
<a href="sib_1.php" onmouseover="showImage('sib_1_tn')" onmouseout="hideImage('sib_1_tn')">Sibling 1 </a>

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Expert Comment

by:leakim971
ID: 36500030
an update to the function in this case : http://jsfiddle.net/QXJWn/

function showImage(image) {
    document.getElementById(image).style.visibility="visible"; 
}
    
function hideImage(image) {
    document.getElementById(image).style.visibility="hidden";  
}

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Accepted Solution

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leakim971 earned 500 total points
ID: 36500036
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Author Comment

by:steva
ID: 36500427
Thanks Leakim.  The basic problem was that I was just using the passed in ID to access the DOM element (image.style.visibility="visible")  instead of going through getElementById().  For some reason Firefox and IE let you get away with  this, but not Safari and Chrome.

Thanks.  I gave you the points.

Steve
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LVL 82

Expert Comment

by:leakim971
ID: 36500462
Hi Steve,

What's up? Yes, you used shorcut references for your fields.
It's a good pratice to use :

document.getElementsByName("NAME_ATTRIBUTE")[0]
or :
document.getElementById("ID_ATTRIBUTE")

please note the << [0] >> on the first one and the << s >> after element
You can have multiple fields with the same name in a page ( [0] for the first one, [1] for the second and so on )

ID should/MUST be unique so there's no getElementsById

Thanks for the points
Best Regards
0
 

Author Comment

by:steva
ID: 36503053
Got it!  Thanks.

(I'm fine. When I'm not doing web pages for people  I'm working my "software" through  Microsoft's "Certified For" program to give it credibility.  I hope all is well with you.).
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LVL 82

Expert Comment

by:leakim971
ID: 36505178
very nice, good luck, don't forget the fun
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