function CheckCookie($name)
{
	var $c = readCookie('download');
	if($c)
	{
		eraseCookie('download');
	}
	createCookie('download',$name,1865);
	$location ='/register/register.php';
	
	/*
	var $db_id = readCookie('db_id');
	if($db_id)
	{
		switch ($name)
		{
			case 'game':
				$location = '/play/';
				break;
			case 'insight':
				$location = '/download/insight.htm';
				break;
			case 'guide':
				$location = '/download/guide.htm';
				break;
			case 'map':
				$location = '/where_study/map.php';
				break;
			default:
				$location = '/register/register.php';
				break;
		}
	}	
	*/
	document.location = $location;
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}