ListTest/2/include/png.js

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