function setHeaderCode(){

		var hHeader = document.getElementById("headed");

		switch (document.getElementById("airport").value){
			case "13":
				hHeader.value = "45";
				break;
			case "27":
				hHeader.value = "34";
				break;
			case "01":
				hHeader.value = "31";
				break;
			case "23":
				hHeader.value = "33";
				break;
			case "40":
				hHeader.value = "35";
				break;
			case "04":
				hHeader.value = "38";
				break;
			case "07":
				hHeader.value = "38";
				break;
			case "22":
				hHeader.value = "47";
				break;
			case "17":
				hHeader.value = "33";
				break;
			case "33":
				hHeader.value = "41";
				break;
			case "37":
				hHeader.value = "41";
				break;
			case "34":
				hHeader.value = "39";
				break;
			case "38":
				hHeader.value = "42";
				break;
			case "42":
				hHeader.value = "35";
				break;
			case "43":
				hHeader.value = "35";
				break;
			case "45":
				hHeader.value = "37";
				break;
			case "46":
				hHeader.value = "37";
				break;
			case "71":
				hHeader.value = "30";
				break;
		}

	}