// http://www.w3schools.com/js/js_cookies.asp		
function cookie_get(c_name)
{
	if ( ! document.cookie.length || (c_start=document.cookie.indexOf(c_name + "=")) < 0 ) 
		return "";
	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))
}

function cookie_set(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 cookie_check()
{
	var start_time=cookie_get('start_time');
	var date=new Date();
	if (start_time!=null && start_time!="") {
		//trace("log","age=" + Math.round((date.getTime() - start_time)/(1000*60*60*24)) );
	}
	else 
		cookie_set('start_time',date.getTime(),1000);
	//var use_count=parseInt("0"+cookie_get('use_count'));
	var use_count=cookie_get('use_count');
	//if (use_count)
	if ( ! use_count || use_count == "" ) {
		//trace("new","");
	} else {
		//trace("friend","c="+use_count);
	}
	use_count++;
	cookie_set('use_count',use_count,1000);
	//document.write("use_count = " + use_count+"<br>");
}