function go_login(app)	{
		var coded_cookie = getCookie("MapNetLogin=");
		var x = ''+(screen.width-200) >> 1; 
		var y = ''+(screen.height-210) >> 1; 
		var str ='top='+y+',left='+x+',width=200,height=210,toolbar=0,location=0,directories=0,status=0,menuBar=0,scrollBars=auto,resizable=yes'; 
		ablak=window.open('portal_login.cfm?cc='+coded_cookie+'&app='+app,'Bejelentkezes',str);
	}
	
	function getCookie(cookie_name)	{
		if (document.cookie.length == 0)	return "";
		var offset = document.cookie.indexOf(cookie_name);
		if (offset == -1)	return "";
		offset += cookie_name.length;
		var end = document.cookie.indexOf(";",offset);
		if (end == -1)	end=document.cookie.length;
		return ( document.cookie.substring(offset, end) );
	}