function isDepartureDate(file_name){

	var departure_id = document.getElementById('main_select').value;
	var collette_data = document.getElementById('collette_data').innerHTML;

	if(departure_id == 0){
		alert('Please select a departure date.');
		return false;
	}else if(departure_id == -1){
		alert('Please select a active tour departure date.');
		return false;
	}else{
		data = collette_data.split('|');
		for(var i=0; i<data.length; i++){
			var items = data[i].split(":");
			if(departure_id == items[0]){
				pageTracker._trackPageview('/outgoing/collette/'+file_name);
				window.location='http://reservations.collettevacations.com/ShopPackage.aspx?CurrencyCode=USD&PackageId='+items[1]+'&TourDate='+items[2]+'&club=&affId=W158-AX1-918&affSubId=&cmc=&cmi=1';
				return false;
			}
		}
		return false;
	}
}