function onSelectChanged(planets, continentsId){
	var continents = document.getElementById(continentsId);
	continents.disabled = false;
	var options = planets.options;
	var options2 = continents.options;
	for(var i=1; i < options.length; i++){
		if(options[i].selected){
			for(var k=1; k < 3 ; k++){
				options2[k] = new Option();
				options2[k].text =  options[i].text + " Kolónia " + k;
				options2[k].value = k;
			}
		}
	}
}