function ajax_item(e){
	if(typeof e=='string')e=document.getElementById(e);
	return e;
	};

//=========================
function collect(a,f){
	var n=[];
	for(var i=0;i<a.length;i++){var v=f(a[i]);if(v!=null)n.push(v); }
  return n;
}

//=====================
ajax={};
ajax.x=function(){
	/*try{return new ActiveXObject('Msxml2.XMLHTTP');}
	catch(e){
		try{return new ActiveXObject('Microsoft.XMLHTTP');}
		catch(e){return new XMLHttpRequest(); }
		} */
   try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
   try { return new XMLHttpRequest(); } catch(e) {}
   alert("XMLHttpRequest not supported");	
};

//===================================
ajax.serialize=function(f){
  var g=function(n){return f.getElementsByTagName(n)};
	
  var nv=function(e){
    if(e.name){
      return encodeURIComponent(e.name)+'='+encodeURIComponent(e.value);
      } 
	  else {return '';}
    };
	
  var i=collect(g('input'),function(i){
	 if((i.type!='radio'&&i.type!='checkbox')||i.checked)return nv(i)});
     var s=collect(g('select'),nv);var t=collect(g('textarea'),nv);
     return i.concat(s).concat(t).join('&');
  };
  
//=======================================
ajax.send=function(u,f,m,a){
	var x=ajax.x();
	x.open(m,u,true);
x.onreadystatechange=function(){
	
	if(x.readyState==4 && x.responseText != null){f(x.responseText); }
	else if(x.readyState==4 && x.responseXML != null){f(x.responseXML); }
	
	};
if(m=='POST')x.setRequestHeader('Content-type','application/x-www-form-urlencoded');
x.send(a);
	};

//=======================================
ajax.get=function(url,func){ajax.send(url,func,'GET')};

//=======================================
ajax.gets=function(url){
	var x=ajax.x();
	x.open('GET',url,false);
	x.send(null);
	return x.responseText;
	}
//=======================================	
ajax.post=function(url,func,args){
	ajax.send(url,func,'POST',args);
	};

//=======================================
ajax.update=function(url,elm){
	var e=ajax_item(elm);
	var f=function(r){e.innerHTML=r;
	}
    ajax.get(url,f);
};

//=======================================
ajax.submit=function(url,elm,frm){
	var e=ajax_item(elm);
	var f=function(r){
	e.innerHTML=r};
	ajax.post(url,f,ajax.serialize(frm));
	};