function showCityDetails(city){
    resetCityDetails();
    document.getElementById("cities").style.display = "block";
    document.getElementById(city).style.display = "block";
}

function resetCityDetails(){
    document.getElementById("cities").style.display = "none";
    
    //var cities = new Array("los_angeles", "mexico_city", "guadalajara", "buenos_aires", "hassi_messaoud", "monrovia", "lubumbashi", "capetown", "london", "helsinki", "warsaw", "belgrade", "bucharest", "sofia", "istanbul", "bangkok", "sana", "melbourne", "sao_paulo", "mali");
	//var cities = new Array("los_angeles", "mexico_city", "buenos_aires", "monrovia", "lubumbashi", "capetown", "london", "warsaw", "bucharest", "bangkok", "sana", "melbourne", "sao_paulo", "mali");
	
	var cities = new Array("sao_paulo", "guadalajara", "buenos_aires", "hassi_messaoud", "mexico_city", "los_angeles", "capetown", "lubumbashi", "monrovia", "london", "helsinki", "warsaw", "belgrade", "bucharest", "istanbul", "sofia", "sana", "bangkok", "melbourne");
	
    for(var i=0; i<cities.length; i++){
        document.getElementById(cities[i]).style.display = "none";
    }
}