Question

Dream Weaver rollover using semi-transparent png

Asked by: JTCollins

I'm using semi-transparent png files in DW MX 2004, by using the alphaloader filter i'm able to kill the grey background in IE using the following

<img src="images/blank.gif" style="width: 103px; height: 138px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/ContactBW.png', width="103" height="138")" />

but when I'm doing rollover images for the buttons the destination png file is still coming up with the grey background bug.  How do I keep this from happening during an image swap?

Thank you in advance

JTCollins

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Asked On
2005-08-19 at 12:23:50ID21533412
Tags

png

,

rollover

,

transparent

Topic

Adobe Dreamweaver

Participating Experts
2
Points
250
Comments
6

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Answers

 

by: Havin_itPosted on 2005-08-22 at 02:40:28ID: 14722772

Hi,

I assume it's the PNG source, ContactBW.png that's being swapped-out.  AFAIK Dreamweaver doesn't offer a canned version of that behaviour, so could you show us your code?

The correct way to swap the PNG would be (I guess) along the lines of

onmouseover="this.style.filter='progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'images/ContactBW_over.png\', width=\"103\" height=\"138\");"

 

by: phiranaPosted on 2005-08-22 at 04:48:25ID: 14723306

Wouldnt it be easier to save your images as .gif becuase .png's are not supported by all browsers!

 

by: JTCollinsPosted on 2005-08-22 at 08:01:56ID: 14724740

Havin it, yes, thats about the way of it, MX 2004 does have a behaviour tab that allows image swap out though.

Here is the code I have so far

onMouseOver="MM_swapImage('Image6','','images/contactC.png',1)" onMouseOut="MM_swapImgRestore()"><img src="images/blank.gif" name="Image6"" height="138" border="0" id="Image6" style="width: 103px; height: 138px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/ContactBW.png', width="103)" /></a>

I tried:

onMouseOver="MM_swapImage('Image6','','filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/Contactc.png',1)" onMouseOut="MM_swapImgRestore()"103)><img src="images/blank.gif" name="Image6"" height="138" border="0" id="Image6" style="width: 103px; height: 138px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/ContactBW.png',1)" /></a>

per your suggstion but afterwards it would not do a image swap at all.


phirana, I currently have them as .gif but am unhappy with the image quality and the blockyness of the transparency.  I know the alphaloader only works on IE 5.5 and later, but I am comfortable with this.  Thank you though.

I'm thinking about just putting the png in flash and using swf instead, but if anyone has another suggestion I'd be happy to hear it.

Thanks for all the help so far.

JTCollins

 

by: Havin_itPosted on 2005-08-23 at 03:55:15ID: 14731934

JT, the problem is you're mis-using a canned script that doesn't do what you need it to; that script is for changing the 'img src=' attribute, whereas what you need to swap is a CSS style attribute.  That script will replace the image ref'd in the HTML (blank.gif) with the string "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/Contactc.png',1)" - if you want to do this, you'll need to look beyond Dreamweaver's walled garden.

Here's an example of how to do it:

<html>
<head><title>Transparency Swap</title>
<script>
function swapTrans(obj,img) {
  obj.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\''+img+'\',1)';
}
</script>
</head>
<body>
<img src="blank.gif" style="width: 103px; height: 138px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/ContactBW.png',1)"
onmouseover="swapTrans(this,'images/Contact.png');"
onmouseout="swapTrans(this,'images/ContactBW.png');" />
</body></html>

Of course this will be pandering to IE only - the normal MM_swapImage script would suffice in other browsers that support PNG Alpha, but then it'd be different HTML code for those browsers too...

 

by: JTCollinsPosted on 2005-08-23 at 10:49:56ID: 14735910

Havin it,

You sir, are my hero.


Thank you so very much.

 

by: Havin_itPosted on 2005-08-23 at 13:48:42ID: 14737700

Aw shucks!  Thanks for the A  :)

20120131-EE-VQP-002

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