var ajax;
var as;
//alert(entityid);
function getajax(){
try{
   ajax = new ActiveXObject("Microsoft.XMLHTTP");
   as = 1;
}catch(e){
   try{
    ajax = new ActiveXObject("Msxml2.XMLHTTP");
    as = 1;
   }catch(e){
    try{
     ajax = new XMLHttpRequest();
     as = 2;
    }catch(e){
     ajax = null;
     as = 0;
    }
   }
}
}

function doXMLHTTP(method, url, pars, runfunc){
getajax();
if(as == 0){
   alert("您的浏览器不支持XMLHTTP，无法完成此操作");
}else{
   ajax.open(method, url, false);
   if(method == "POST"){
    ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
   }else{
    ajax.setRequestHeader("Content-Type", "text/xml;charset=GB2312");
   }
   if(as == 1){
    ajax.onreadystatechange = runfunc;
   }else{
    ajax.onload = runfunc;
    ajax.onerror = runfunc;
   }
   ajax.send(pars);
}
}

function doCallback(){
  //ajax.responseText;
}

doXMLHTTP("GET", 'log.php?'+entityid, "", doCallback);