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I was wanted to apply the transparent filter to the background images in a webpage. I used sleight.js to solve the Internet Explorer behaviour in making the PNG files transparent. But, this script lacked in processing the background images (like the images set for "background" attributes).

I tried to sort it out. Check the below self-documented JS script that loops thru the background images and applies the filter

<script>    
// *************    
// FIX : for the background images of th TD tag    
// ***************    
function fixBackgroundPng()
{
          //Get all the TD's        
          var tgTags = document.getElementsByTagName("td"); 


if
(tgTags == null) return; //Loop thru the Td's and find whether         //Any PNG file is set as background         for(var c=0;c<tgTags.length;c++) var src = tgTags[c].background; if(src.match(/\.png$/i)!=null) { //If any PNG file is set as background                 //Apply the filter in the same way                 //How sleight.js does. var h,w; if(tgTags[c].height){ h= tgTags[c].height; tgTags[c].style.height = h + "px"; } if(tgTags[c].width){ w= tgTags[c].width; tgTags[c].style.width = w + "px"; } tgTags[c].style.filter
= "progid:DXImageTransform.Microsoft.AlphaImageLoader
(src='"
+ src + "', sizingMethod='scale')"; tgTags[c].background = "x.gif"; } } }
//Attach funtion with OnLoad event, so that all the PNGs      //will be processed while the page loads.     if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) { window.attachEvent("onload",fixBackgroundPng); } >

Sorry dudes, I can't format the code more perfectly, let me know if you have any issues while using this code.

posted on Thursday, April 20, 2006 5:42 AM