tiny xhr snippet to do XMLHttpRequest

tinyxhr.js

// tinyxhr by Shimon Doodkin - licanse: public doamin - https://gist.github.com/4706967
//
// tinyxhr("http://site.com/ajaxaction",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data)  });
// tinyxhr("http://site.com/ajaxaction",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data)  },'POST','value1=1&value2=2');
// tinyxhr("http://site.com/ajaxaction.json",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data); console.log(JSON.parse(data))  },'POST',JSON.stringify({value:1}),'application/javascript'); 
// cb - a callback function like: function (err,data,XMLHttpRequestObject){ if (err) throw err;   }
// 

function tinyxhr(url,cb,method,post,contenttype)
{
 var requestTimeout,xhr;
 try{ xhr = new XMLHttpRequest(); }catch(e){
 try{ xhr = new ActiveXObject("Msxml2.XMLHTTP"); }catch (e){
  if(console)console.log("tinyxhr: XMLHttpRequest not supported");
  return null;
 }
 }
 requestTimeout = setTimeout(function() {xhr.abort(); cb(new Error("tinyxhr: aborted by a timeout"), "",xhr); }
                             , 10000);
 xhr.onreadystatechange = function()
 {
  if (xhr.readyState != 4) return;
  clearTimeout(requestTimeout);
  cb(xhr.status != 200?new Error("tinyxhr: server respnse status is "+xhr.status):false, xhr.responseText,xhr);
 }
 xhr.open(method?method.toUpperCase():"GET", url, true);
 
 //xhr.withCredentials = true;
  
 if(!post)
  xhr.send();
 else
 {
  xhr.setRequestHeader('Content-type', contenttype?contenttype:'application/x-www-form-urlencoded');
  xhr.send(post)
 }
}

//tinyxhr("/test",function (err,data,xhr){ if (err) console.log("goterr ",err); console.log(data)  });

tinyxhr.min.js

// tinyxhr by Shimon Doodkin - licanse: public doamin - https://gist.github.com/4706967
//
// tinyxhr("http://site.com/ajaxaction",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data)  });
// tinyxhr("http://site.com/ajaxaction",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data)  },'POST','value1=1&value2=2');
// tinyxhr("http://site.com/ajaxaction.json",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data); console.log(JSON.parse(data))  },'POST',JSON.stringify({value:1}),'application/javascript'); 
// cb - a callback function like: function (err,data,XMLHttpRequestObject){ if (err) throw err;   }
// 

function tinyxhr(url,cb,method,post,contenttype){var c=url,a=cb,i=method,f=post,b=contenttype;var d,h;try{h=new XMLHttpRequest()}catch(g){try{h=new ActiveXObject("Msxml2.XMLHTTP")}catch(g){if(console){console.log("tinyxhr: XMLHttpRequest not supported")}return null}}d=setTimeout(function(){h.abort();a(new Error("tinyxhr: aborted by a timeout"),"",h)},10000);h.onreadystatechange=function(){if(h.readyState!=4){return}clearTimeout(d);a(h.status!=200?new Error("tinyxhr: server respnse status is "+h.status):false,h.responseText,h)};h.open(i?i.toUpperCase():"GET",c,true);if(!f){h.send()}else{h.setRequestHeader("Content-type",b?b:"application/x-www-form-urlencoded");h.send(f)}};

the most advanced fork is here:
https://gist.github.com/collinsjd/adb9a00fb26146e313