function $(id) { return document.getElementById(id) }
function $c(name) { return $ce(name,null,null) }
function $ce(name,params,style) { var el = document.createElement(name); if(params) for(var i in params) el[i]=params[i]; if(style) for(var i in style) el.style[i]=style[i]; return el; }
function $re(el) { if(!el||!el.parentNode) return; el.parentNode.removeChild(el); }
function addClass(el,c) { if(!el) return; if(!containsClass(el, c)) el.className += " " + c; }
function removeClass(el, c) { if(!el) return; el.className = el.className.replace(new RegExp(c,"g"),""); }
function containsClass(el, c) { if(!el) return false; return el.className.indexOf(c) != -1 }
function addEvent(obj, type, fn){
  if (obj.addEventListener)
    obj.addEventListener(type, fn, false);
  else if (obj.attachEvent){
    obj["e"+type+fn] = fn;
    obj[type+fn] = function(){obj["e"+type+fn](window.event);}
    obj.attachEvent("on"+type, obj[type+fn]);
  }
}
function getCookie(name)
{
	var arg	= name + '=';
	var alen = arg.length;
	var	clen =document.cookie.length;
	var i = 0;
	while (i < clen)
	{
		var j = i + alen;
		if (document.cookie.substring(i,j)==arg) return getCookieVal(j);
		i = document.cookie.indexOf(" ",i) + 1;
		if (i==0) break;
	};
	return null;
}

function setCookie(name,value,path,expires)
{
	str = name + "=" + value;
	if (expires) str += " ;expires="+expires;
        if (path) str += " ;path="+path;
	document.cookie = str;
}

function getCookieVal(offset)
{
	var endstr = document.cookie.indexOf(";", offset);
	if (endstr==-1) endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset,endstr));
};

function delCookie(name)
{
	if (getCookie(name))
    	document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT";
}
function ajaxRequest(url, method, containerResponse, postFunction)
{
	var req;
	if(window.XMLHttpRequest)
		req = new XMLHttpRequest();
	else if(window.ActiveXObject)
		req = new ActiveXObject("Microsoft.XMLHTTP");
	// if browser doesn't support ajax return true
	if(!req) return false;

	method = method.toUpperCase();

	// process function
 	req.onreadystatechange=function()
 	{
  		if (req.readyState == 4)
  			if(req.status == 200)
  			{
  				if(containerResponse) containerResponse.innerHTML = req.responseText;
  				if(postFunction) postFunction(req);
  			}
	}

	// send request
	if(method == "GET")
	{
		req.open(method, url, true );
		req.send(null);
	}
	else if(method == "POST")
	{
		try // catch an exception to prevent errors (opera <= 8 doesn't supp$ort post request)
		{
			req.open(method, url.slice(0,url.indexOf("?")), true );
			var parameters = url.slice(url.indexOf("?") + 1);
			req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	      	req.setRequestHeader("Content-length", parameters.length);
	      	req.setRequestHeader("Connection", "close");
	      	req.send(parameters);
      	}
      	catch (e)
      	{
      		return false;
      	}
	}
	else
	{
		alert("Not normal method: " + method);
		return false;
	}

	return true;
}
window.onload = function()
{
	var test = $c("div");
	test.style.background = "red";
	test.style.position.top = "10px"
}