/** IPv6 AAAA connectivity testing *******************************************************
  *
  *  Description: Uses hidden images to measure the possible negative impact of IPv6
  *  enabling the Wikimedia sites.
  *  This works by adding a hidden div to the footer with several image tags. 
  *  The source addresses of the image tags are set to domainnames which have v4, v6 and
  *  both address types set.  The script times how long objects take to load.
  *  Results are sent back to the server. http://ipv6and4.labs.wikimedia.org/stats.html
  *  Based on http://www.braintrust.co.nz/ipv6wwwtest/
  *  Contact: [[User:Gmaxwell]], [[User:Mark Bergsma]], [[User:Mindspillage]]
  */
        var __ipv6wwwtest_timeoutMsec = 10000; // Timeout for 'final' result message in milliseconds
        var __ipv6wwwtest_hostSuffix = ".labs.wikimedia.org"; // Suffix to go on the IMG hostnames
        var __ipv6wwwtest_stopAtTimeout = true; // Whether to stop when the timeout is reached or not
 
        var __ipv6wwwtest_pageLoadTime;
        var __ipv6wwwtest_timeout = false;
        var __ipv6wwwtest_ipv4LoadTime = false;
        var __ipv6wwwtest_ipv4relLoadTime = false;
        var __ipv6wwwtest_ipv6LoadTime = false;
        var __ipv6wwwtest_ipv6bigLoadTime = false;
        var __ipv6wwwtest_ipv6and4LoadTime = false;
        var __ipv6wwwtest_id = Math.floor(Math.random()*Math.pow(2,31));
 
        function __ipv6wwwtest_startTest() {
                __ipv6wwwtest_pageLoadTime = new Date();
                document.getElementById("__ipv6wwwtest_ipv4Img").src = "http://ipv4" + __ipv6wwwtest_hostSuffix +"/ipv4.gif?id=" + __ipv6wwwtest_id;
                document.getElementById("__ipv6wwwtest_ipv4relImg").src = "//ipv4" + __ipv6wwwtest_hostSuffix +"/ipv4.gif?rel=1&id=" + __ipv6wwwtest_id;
                document.getElementById("__ipv6wwwtest_ipv6Img").src = "http://ipv6" + __ipv6wwwtest_hostSuffix +"/ipv6.gif?id=" + __ipv6wwwtest_id;
                document.getElementById("__ipv6wwwtest_ipv6and4Img").src = "http://ipv6and4" + __ipv6wwwtest_hostSuffix +"/ipv6and4.gif?id=" + __ipv6wwwtest_id;
                document.getElementById("__ipv6wwwtest_ipv6bigImg").src = "http://ipv6" + __ipv6wwwtest_hostSuffix +"/ipv6big.gif?id=" + __ipv6wwwtest_id;
        }
 
        function __ipv6wwwtest_sendResults(stage) {
                document.getElementById("__ipv6wwwtest_resultsImg").src = "http://results" + __ipv6wwwtest_hostSuffix +"/results.gif?id=" + __ipv6wwwtest_id + "&stage=" + stage + "&timeout=" + __ipv6wwwtest_timeoutMsec + "&stop_at_timeout=" + __ipv6wwwtest_stopAtTimeout + "&ipv4=" + __ipv6wwwtest_getLoadTime(__ipv6wwwtest_ipv4LoadTime) + "&ipv6=" + __ipv6wwwtest_getLoadTime(__ipv6wwwtest_ipv6LoadTime) + "&ipv6and4=" + __ipv6wwwtest_getLoadTime(__ipv6wwwtest_ipv6and4LoadTime) + "&ipv6big=" + __ipv6wwwtest_getLoadTime(__ipv6wwwtest_ipv6bigLoadTime) +"&ipv4rel="+ __ipv6wwwtest_getLoadTime(__ipv6wwwtest_ipv4relLoadTime) + "&rate=" + __ipv6wwwtest_factor;
        };
 
        function __ipv6wwwtest_getLoadTime(item) {
                if (item == false) {
                        return "NaN";
                } else {
                        return (item.getTime() - __ipv6wwwtest_pageLoadTime.getTime());
                }
        }
 
        function __ipv6wwwtest_checkFinished() {
                if ( (! __ipv6wwwtest_ipv6LoadTime) || (! __ipv6wwwtest_ipv4LoadTime) || (! __ipv6wwwtest_ipv6and4LoadTime) || (! __ipv6wwwtest_ipv6bigLoadTime) || (! __ipv6wwwtest_getLoadTime)) {
                        if (!__ipv6wwwtest_timeout) {
                                __ipv6wwwtest_timeout = window.setTimeout('__ipv6wwwtest_sendFinalResults()',__ipv6wwwtest_timeoutMsec);
                        }
                        __ipv6wwwtest_sendResults('partial');
                } else {
                        __ipv6wwwtest_sendFinalResults();
                }
        }
 
        function __ipv6wwwtest_sendFinalResults() {
                if (__ipv6wwwtest_done==0) {
                  if (__ipv6wwwtest_timeout) {
                          window.clearTimeout(__ipv6wwwtest_timeout);
                  }
                  __ipv6wwwtest_sendResults('final');
 
                  if (__ipv6wwwtest_stopAtTimeout) {
                          document.getElementById("__ipv6wwwtest_ipv4Img").src = "";
                          document.getElementById("__ipv6wwwtest_ipv4relImg").src = "";
                          document.getElementById("__ipv6wwwtest_ipv6Img").src = "";
                          document.getElementById("__ipv6wwwtest_ipv6and4Img").src = "";
                          document.getElementById("__ipv6wwwtest_ipv6bigImg").src = "";
                  }
                }
                __ipv6wwwtest_done=1;
        }
  addOnloadHook(function() {
        v6sub=document.getElementById("footer") || document.getElementById( "foot-icons" );
        if( !v6sub ) return;
        v6sub.innerHTML=v6sub.innerHTML+'<div style="visibility: hidden;"> <img height="1" width="1" src="" id="__ipv6wwwtest_ipv4Img" onload="__ipv6wwwtest_ipv4LoadTime = new Date(); __ipv6wwwtest_checkFinished();" /> <img height="1" width="1" src="" id="__ipv6wwwtest_ipv4relImg" onload="__ipv6wwwtest_ipv4relLoadTime = new Date(); __ipv6wwwtest_checkFinished();" /> <img height="1" width="1" src="" id="__ipv6wwwtest_ipv6and4Img" onload="__ipv6wwwtest_ipv6and4LoadTime = new Date(); __ipv6wwwtest_checkFinished();" /> <img height="1" width="1" src="" id="__ipv6wwwtest_ipv6Img" onload="__ipv6wwwtest_ipv6LoadTime = new Date(); __ipv6wwwtest_checkFinished();" /> <img height="1" width="1" src="" id="__ipv6wwwtest_ipv6bigImg" onload="__ipv6wwwtest_ipv6bigLoadTime = new Date(); __ipv6wwwtest_checkFinished();" /> <img height="1" width="1" src="" id="__ipv6wwwtest_resultsImg" /> </div>';
       if (document.getElementById("__ipv6wwwtest_ipv4Img") && document.getElementById("__ipv6wwwtest_ipv6Img") && document.getElementById("__ipv6wwwtest_ipv6and4Img") && document.getElementById("__ipv6wwwtest_ipv6bigImg")) {
         __ipv6wwwtest_startTest();
       }
   });