var oldSelValue1 = "1-1";
	var oldSelValue2 = "1-2";
	var oldSelValue3 = "1-3";
	var oldSelValue4 = "1-4";
	var oldSelValue5 = "1-5";
	function secenekDeg(xdeg) {
		karakter = xdeg.name.substring(12,13);
		var selValue = xdeg.options[xdeg.selectedIndex].value + '-' + karakter;
		
		switch (karakter) {
			case "1" : 
				document.getElementById(oldSelValue1).style.display='none';
				document.getElementById(selValue).style.display='block';
				oldSelValue1=selValue; 
			break; 
			case "2" : 
				document.getElementById(oldSelValue2).style.display='none';
				document.getElementById(selValue).style.display='block';
				oldSelValue2=selValue; 
			break; 
			case "3" : 
				document.getElementById(oldSelValue3).style.display='none';
				document.getElementById(selValue).style.display='block';
				oldSelValue3=selValue; 
			break; 
			case "4" : 
				document.getElementById(oldSelValue4).style.display='none';
				document.getElementById(selValue).style.display='block';
				oldSelValue4=selValue; 
			break; 
			case "5" : 
				document.getElementById(oldSelValue5).style.display='none';
				document.getElementById(selValue).style.display='block';
				oldSelValue5=selValue; 
			break; 
		   default : 
			  oldSelValue='1';
		}
	}