var prev_city = "city1";

function display_entrants(city){
	document.getElementById(city).style.display="block";	

	if(city == "city1"){
		document.getElementById('pointer').style.left="20px";
		document.getElementById('pointer').style.display="block";
	}else if(city == "city2"){
		document.getElementById('pointer').style.left="125px";
		document.getElementById('pointer').style.display="block";
	}else if(city == "city3"){
		document.getElementById('pointer').style.left="228px";
		document.getElementById('pointer').style.display="block";
	}else if(city == "city4"){
		document.getElementById('pointer').style.left="328px";
		document.getElementById('pointer').style.display="block";
	}else if(city == "city5"){
		document.getElementById('pointer').style.left="430px";
		document.getElementById('pointer').style.display="block";
	}else if(city == "city6"){
		document.getElementById('pointer').style.left="546px";
		document.getElementById('pointer').style.display="block";
	}
	
	if(prev_city != city){
		close_prev(prev_city);
	}
	
	prev_city = city;
}

function close_prev(city){
	document.getElementById(city).style.display="none";
}


function random_entrant(){
	var entrant_number =  Math.floor((6-0)*Math.random()) + 1;
	var start_entrant = "city" + entrant_number;
	
	display_entrants(start_entrant);
}