crossdomain.xml & Flash - What the Dilly?!

If you are having ActionScript problems with Flash, and you can't figure it out exactly, but noticed that the ActionScript is working when you have http://domain.com but not when it's http://www.domain.com/, you probably need to rethink your Flash embedding technique and add a crossdomain.xml file to the root of your website's public folder. Add this snippet of code to your head tag :
<script language="JavaScript" type="text/javascript">
  <!--  //v1.7  // Flash Player Version Detection  // Detect Client Browser type  // Copyright 2005-2008 Adobe Systems Incorporated.  All rights reserved.  var isIE  = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;  var isWin = (navigator.appVersion.toLowerCase().indexOf("win") != -1) ? true : false;  var isOpera = (navigator.userAgent.indexOf("Opera") != -1) ? true : false;  function ControlVersion()  {  var version;  var axo;  var e;  // NOTE : new ActiveXObject(strFoo) throws an exception if strFoo isn't in the registry  try {  // version will be set for 7.X or greater players  axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");  version = axo.GetVariable("$version");  } catch (e) {  }  if (!version)  {  try {  // version will be set for 6.X players only  axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");    // installed player is some revision of 6.0  // GetVariable("$version") crashes for versions 6.0.22 through 6.0.29,  // so we have to be careful.     // default to the first public version  version = "WIN 6,0,21,0";  // throws if AllowScripAccess does not exist (introduced in 6.0r47)   axo.AllowScriptAccess = "always";  // safe to call for 6.0r47 or greater  version = axo.GetVariable("$version");  } catch (e) {  }  }  if (!version)  {  try {  // version will be set for 4.X or 5.X player  axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.3");  version = axo.GetVariable("$version");  } catch (e) {  }  }  if (!version)  {  try {  // version will be set for 3.X player  axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.3");  version = "WIN 3,0,18,0";  } catch (e) {  }  }  if (!version)  {  try {  // version will be set for 2.X player  axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");  version = "WIN 2,0,0,11";  } catch (e) {  version = -1;  }  }    return version;  }  // JavaScript helper required to detect Flash Player PlugIn version information  function GetSwfVer(){  // NS/Opera version >= 3 check for Flash plugin in plugin array  var flashVer = -1;    if (navigator.plugins != null && navigator.plugins.length > 0) {  if (navigator.plugins["Shockwave Flash 2.0"] || navigator.plugins["Shockwave Flash"]) {  var swVer2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";  var flashDescription = navigator.plugins["Shockwave Flash" + swVer2].description;  var descArray = flashDescription.split(" ");  var tempArrayMajor = descArray[2].split(".");   var versionMajor = tempArrayMajor[0];  var versionMinor = tempArrayMajor[1];  var versionRevision = descArray[3];  if (versionRevision == "") {  versionRevision = descArray[4];  }  if (versionRevision[0] == "d") {  versionRevision = versionRevision.substring(1);  } else if (versionRevision[0] == "r") {  versionRevision = versionRevision.substring(1);  if (versionRevision.indexOf("d") > 0) {  versionRevision = versionRevision.substring(0, versionRevision.indexOf("d"));  }  }  var flashVer = versionMajor + "." + versionMinor + "." + versionRevision;  }  }  // MSN/WebTV 2.6 supports Flash 4  else if (navigator.userAgent.toLowerCase().indexOf("webtv/2.6") != -1) flashVer = 4;  // WebTV 2.5 supports Flash 3  else if (navigator.userAgent.toLowerCase().indexOf("webtv/2.5") != -1) flashVer = 3;  // older WebTV supports Flash 2  else if (navigator.userAgent.toLowerCase().indexOf("webtv") != -1) flashVer = 2;  else if ( isIE && isWin && !isOpera ) {  flashVer = ControlVersion();  }   return flashVer;  }  // When called with reqMajorVer, reqMinorVer, reqRevision returns true if that version or greater is available  function DetectFlashVer(reqMajorVer, reqMinorVer, reqRevision)  {  versionStr = GetSwfVer();  if (versionStr == -1 ) {  return false;  } else if (versionStr != 0) {  if(isIE && isWin && !isOpera) {  // Given "WIN 2,0,0,11"  tempArray         = versionStr.split(" "); 	// ["WIN", "2,0,0,11"]  tempString        = tempArray[1];			// "2,0,0,11"  versionArray      = tempString.split(",");	// ['2', '0', '0', '11']  } else {  versionArray      = versionStr.split(".");  }  var versionMajor      = versionArray[0];  var versionMinor      = versionArray[1];  var versionRevision   = versionArray[2];  // is the major.revision >= requested major.revision AND the minor version >= requested minor  if (versionMajor > parseFloat(reqMajorVer)) {  return true;  } else if (versionMajor == parseFloat(reqMajorVer)) {  if (versionMinor > parseFloat(reqMinorVer))  return true;  else if (versionMinor == parseFloat(reqMinorVer)) {  if (versionRevision >= parseFloat(reqRevision))  return true;  }  }  return false;  }  }  function AC_AddExtension(src, ext)  {  if (src.indexOf('?') != -1)  return src.replace(/\?/, ext+'?');   else  return src + ext;  }  function AC_Generateobj(objAttrs, params, embedAttrs)   {   var str = '';  if (isIE && isWin && !isOpera)  {  str += '<object ';  for (var i in objAttrs)  {  str += i + '="' + objAttrs[i] + '" ';  }  str += '>';  for (var i in params)  {  str += '<param name="' + i + '" value="' + params[i] + '" /> ';  }  str += '</object>';  }  else  {  str += '<embed ';  for (var i in embedAttrs)  {  str += i + '="' + embedAttrs[i] + '" ';  }  str += '> </embed>';  }  document.write(str);  }  function AC_FL_RunContent(){  var ret =   AC_GetArgs  (  arguments, ".swf", "movie", "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"  , "application/x-shockwave-flash"  );  AC_Generateobj(ret.objAttrs, ret.params, ret.embedAttrs);  }  function AC_SW_RunContent(){  var ret =   AC_GetArgs  (  arguments, ".dcr", "src", "clsid:166B1BCA-3F9C-11CF-8075-444553540000"  , null  );  AC_Generateobj(ret.objAttrs, ret.params, ret.embedAttrs);  }  function AC_GetArgs(args, ext, srcParamName, classid, mimeType){  var ret = new Object();  ret.embedAttrs = new Object();  ret.params = new Object();  ret.objAttrs = new Object();  for (var i=0; i < args.length; i=i+2){  var currArg = args[i].toLowerCase();   switch (currArg){   case "classid":  break;  case "pluginspage":  ret.embedAttrs[args[i]] = args[i+1];  break;  case "src":  case "movie":   args[i+1] = AC_AddExtension(args[i+1], ext);  ret.embedAttrs["src"] = args[i+1];  ret.params[srcParamName] = args[i+1];  break;  case "onafterupdate":  case "onbeforeupdate":  case "onblur":  case "oncellchange":  case "onclick":  case "ondblclick":  case "ondrag":  case "ondragend":  case "ondragenter":  case "ondragleave":  case "ondragover":  case "ondrop":  case "onfinish":  case "onfocus":  case "onhelp":  case "onmousedown":  case "onmouseup":  case "onmouseover":  case "onmousemove":  case "onmouseout":  case "onkeypress":  case "onkeydown":  case "onkeyup":  case "onload":  case "onlosecapture":  case "onpropertychange":  case "onreadystatechange":  case "onrowsdelete":  case "onrowenter":  case "onrowexit":  case "onrowsinserted":  case "onstart":  case "onscroll":  case "onbeforeeditfocus":  case "onactivate":  case "onbeforedeactivate":  case "ondeactivate":  case "type":  case "codebase":  case "id":  ret.objAttrs[args[i]] = args[i+1];  break;  case "width":  case "height":  case "align":  case "vspace":   case "hspace":  case "class":  case "title":  case "accesskey":  case "name":  case "tabindex":  ret.embedAttrs[args[i]] = ret.objAttrs[args[i]] = args[i+1];  break;  default:  ret.embedAttrs[args[i]] = ret.params[args[i]] = args[i+1];  }  }  ret.objAttrs["classid"] = classid;  if (mimeType) ret.embedAttrs["type"] = mimeType;  return ret;  }  // -->  </script>
Embed your Flash movie like so:
<script language="JavaScript" type="text/javascript">AC_FL_RunContent('codebase', 'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0','width', '850','height', '450','src', 'introslogo','quality', 'high','pluginspage', 'http://www.adobe.com/go/getflashplayer','align', 'middle','play', 'true','loop', 'true','scale', 'showall','wmode', 'window','devicefont', 'false','id', 'introslogo','bgcolor', '#ff0099','name', 'introslogo','menu', 'true','allowFullScreen', 'false','allowScriptAccess','always','movie', 'introslogo','salign', ''); //end AC code</script><noscript><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="850" height="450" id="introslogo" align="middle"><param name="allowScriptAccess" value="always" /><param name="allowFullScreen" value="false" /><param name="movie" value="http://domain.com/file.swf" /><param name="quality" value="high" /><param name="bgcolor" value="#ff0099" />	<embed src="http://domain.com/file.swf" quality="high" bgcolor="#ff0099" width="850" height="450" name="introslogo" align="middle" allowScriptAccess="always" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.adobe.com/go/getflashplayer" /></object></noscript>
Then make a new XML file called "crossdomain.xml" drop it in the root directory of your public folder, and then Google "crossdomain.xml" to create an appropriate crossdomain file for your use.





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