function deleteCookie(c_name){
	if ( getCookie( c_name ) ) document.cookie = c_name + '=;expires=Thu, 01-Jan-1970 00:00:01 GMT';    
    }

    function getCookie(c_name){
	if (document.cookie.length>0){
	    c_start=document.cookie.indexOf(c_name + "=");
    	    if (c_start!=-1){ 
    		c_start=c_start + c_name.length+1 ;
                c_end=document.cookie.indexOf(";",c_start);
                if (c_end==-1)
            	    c_end=document.cookie.length;
            	    return unescape(document.cookie.substring(c_start,c_end));
            } 
        }
        return ""
    }

    function setCookie(c_name,value,expiredays){
	var exdate=new Date();
        exdate.setDate(exdate.getDate()+expiredays);
        document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : "; expires="+exdate.toGMTString());
    }

    function checkCookie(){
//    alert(document.location.hostname);
	referer=getCookie('referer');
        if (referer!=null && referer!=""){
//        alert(referer+'Jest');	// jest w ciachu referer, czyli czekamy na akcje w koszyku
        }else{		// bak referera, czyli musimy ustawic
  		referer=document.referrer;            
        	setCookie('referer',referer,365);
        }
//        alert(referer);
    }
    
    function doAction(data){
	current_url = document.location.hostname;
	if(getCookie('referer').lastIndexOf(current_url) !=-1){
//	    alert('prawda'+getCookie('referer'));
	}else{
//	    alert('Dodajemy: '+getCookie('referer'));
	    loadCode('http://www.trade.seocompany.pl/trade_log.php?action=addLog&'+data+'&referer='+encodeURIComponent(getCookie('referer')));
    	    deleteCookie('referer'); // tutaj usunac cookie po udanej akcji np. zakupow
    	    }
    }

    function loadCode(url){
	var script = document.createElement("script");
	script.type = "text/javascript";
	script.src = url;
	document.getElementsByTagName("head")[0].appendChild(script);
    }