function getXmlHttpPrefix() {
    if (getXmlHttpPrefix.prefix)
        return getXmlHttpPrefix.prefix;
    
    var prefixes = ["MSXML2", "Microsoft", "MSXML", "MSXML3"];
    var o;
    for (var i = 0; i < prefixes.length; i++) {
        try {
            // try to create the objects
            o = new ActiveXObject(prefixes[i] + ".XmlHttp");
            return getXmlHttpPrefix.prefix = prefixes[i];
        }
        catch (ex) {};
    }
    
    throw new Error("Could not find an installed XML parser");
}

//////////////////////////
// Start the Real stuff //
//////////////////////////


// XmlHttp factory
function XmlHttp() {}

XmlHttp.create = function () {
    try {
        if (window.XMLHttpRequest) {
            var req = new XMLHttpRequest();
            
            // some versions of Moz do not support the readyState property
            // and the onreadystate event so we patch it!
            if (req.readyState == null) {
                req.readyState = 1;
                req.addEventListener("load", function () {
                    req.readyState = 4;
                    if (typeof req.onreadystatechange == "function")
                        req.onreadystatechange();
                }, false);
            }
            
            return req;
        }
        if (window.ActiveXObject) {
            return new ActiveXObject(getXmlHttpPrefix() + ".XmlHttp");
        }
    }
    catch (ex) {}
    // fell through
    throw new Error("Your browser does not support XmlHttp objects");
};

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
MM_preloadImages('http://www.linkwan.com/gb/broadmeter/SpeedAuto/images/guage.gif');
MM_preloadImages('http://www.linkwan.com/gb/broadmeter/SpeedAuto/images/black.gif');

function timecount()
    { var time;
       time = new Date();
       return time.getTime();     
    } 

 var  Url,strA,theOKreadyState,UploadTimeCount,UploadCheckCount,Retrieval,iterval,UploadTimeStart,TimeOutId;   
  
  function doUploadcentiData()
    {
        Retrieval =XmlHttp.create();  
        Retrieval.open("POST", Url, true);
        Retrieval.setRequestHeader("Content-Length",strA.length);  
        Retrieval.setRequestHeader("CONTENT-TYPE","application/x-www-form-urlencoded");  
        Retrieval.onreadystatechange = function () {
              if (Retrieval.readyState >= theOKreadyState)
              {              
                 doUploadTestUpdate(); 
              }
          }      
        Retrieval.send(strA);
        UploadCheckCount++;
    }

function doUploadTestUpdate() 
{
      document.showupspeed .upguage .value = UploadCheckCount+"%";
      MM_swapImage('upspeed'+UploadCheckCount,'','http://www.linkwan.com/gb/broadmeter/SpeedAuto/images/guage.gif',1);
      if( UploadCheckCount < 100 )
      {                        
                doUploadcentiData();
      }
      else/*到100次提交*/
      {
             doTestSubmit();
     } 
}
 
function doUploadTest() 
{
    UploadTimeStart =  timecount(); /*记录开始时间*/
    TimeOutId = setTimeout('doUploadTestLoop();',iterval ); /*定时检查超时*/
}

function doUploadTestLoop() 
{
    if ( timecount() - UploadTimeStart > 1000 * 80 )/*超时提交*/
    {
        doTestSubmit();
    }   
}

function doTestSubmit()
{
               UploadTimeCount = timecount() - UploadTimeStart;
               if(document.speedtimeit.TesterVersion.value!='V3.0'){document.speedtimeit.UploadPercent.value = UploadCheckCount;}
                document.speedtimeit.UploadTimeIt.value = UploadTimeCount /1000;     
                clearTimeout(TimeOutId);                  
                Retrieval.onreadystatechange = function () {}                
                document.speedtimeit.submit();  
} 


// check browsers
var op = /opera 5|opera\/5/i.test(navigator.userAgent);
var ie = !op && /msie/i.test(navigator.userAgent);  // preventing opera to be identified as ie
var mz = !op && /mozilla\/5/i.test(navigator.userAgent);    // preventing opera to be identified as mz

if (ie && document.getElementById == null) {    // ie4
    document.getElementById = function(sId) {
        return document.all[sId];
    };
}

/* end browser checks */