gosa-core/html/include/png.js

   1 if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent)
   2         window.attachEvent("onload", pngLoadPngs);
   3
   4 // parses all images //public
   5 function pngLoadPngs()
   6 {
   7         var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
   8         var itsAllGood = (rslt != null && Number(rslt[1]) > 5.5);
   9
  10         if (itsAllGood) {
  11                 for (var i = 0; i < document.images.length; i++) {
  12                         pngLoad(document.images[i]);
  13                 }
  14                 for (var i = 0; i < document.getElementsByTagName("input").length; i++) {
  15                         var img = document.getElementsByTagName("input")[i];
  16                         if(typeof img.type == "string" && img.type == "image") {
  17                                 pngLoad(img);
  18                         }
  19                 }
  20         }
  21 }
  22
  23 // loads an image, src is optional // public
  24 function pngLoad(img,src)
  25 {
  26         if (typeof img == "object" && typeof img.tagName == "string" && img.tagName == "IMG")
  27         {
  28                 // this is an image
  29                 if (typeof src == "string")
  30                 {
  31                         // src parameter is present
  32                         if (src.match(/\.png$/i) != null)
  33                         {
  34                                 // this is png image
  35                                 img.style.width = null;
  36                                 img.style.height = null;
  37                                 img.style.filter = null;
  38                                 img.src = src;
  39                                 pngSwapPrepare(img);
  40                         }
  41                         else
  42                         {
  43                                 // its not a png
  44                                 img.src = src;
  45                         }
  46                 }
  47                 else if (img.src.match(/\.png$/i) != null)
  48                 {
  49                                 // no src arameter, but its png -> simply swap
  50                                 pngSwapPrepare(img);
  51                 }
  52         } else if (typeof img.tagName == "string" && img.tagName == "INPUT") {
  53                 if(img.src.match(/\.png$/i) != null) {
  54                         pngSwapPrepare(img);
  55                 }
  56         }
  57
  58         // swap (if complete) or shedule it to onload event // private
  59         function pngSwapPrepare(img)
  60         {
  61                 if (img.complete)
  62                         pngSwap(img);
  63                 else
  64                         img.attachEvent("onload",pngOnLoadSwap);
  65         }
  66
  67         // supposed to be called when image is loaded into memory //private
  68         function pngOnLoadSwap()
  69         {
  70                 event.srcElement.detachEvent("onload",pngOnLoadSwap);
  71                 pngSwap(event.srcElement);
  72         }
  73
  74         // Swaps img and background //private
  75         function pngSwap(img)
  76         {
  77                 with (img)
  78                 {
  79                         style.width = width + "px";
  80                         style.height = height + "px";
  81                         style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale') ";
  82                         src = "images/null.gif";
  83                 }
  84         }
  85 }