function selectCode1(nr){
	var elemCode1 = document.getElementById("code_1");
	var elemCode2 = document.getElementById("code_2");
	if(nr == 1){
		elemCode1.style.display = "block";
		elemCode2.style.display = "none";
	} else if(nr == 2){
		elemCode1.style.display = "none";
		elemCode2.style.display = "block";
	}
}
function selectCode2(nr){
	var elemCode3 = document.getElementById("code_3");
	var elemCode4 = document.getElementById("code_4");
	if(nr == 3){
		elemCode3.style.display = "block";
		elemCode4.style.display = "none";
	} else if(nr == 4){
		elemCode3.style.display = "none";
		elemCode4.style.display = "block";
	}
}
function selectCode3(nr){
	var elemCode5 = document.getElementById("code_5");
	var elemCode6 = document.getElementById("code_6");
	if(nr == 5){
		elemCode5.style.display = "block";
		elemCode6.style.display = "none";
	} else if(nr == 6){
		elemCode5.style.display = "none";
		elemCode6.style.display = "block";
	}
}
function selectCode4(nr){
	var elemCode7 = document.getElementById("code_7");
	var elemCode8 = document.getElementById("code_8");
	if(nr == 7){
		elemCode7.style.display = "block";
		elemCode8.style.display = "none";
	} else if(nr == 8){
		elemCode7.style.display = "none";
		elemCode8.style.display = "block";
	}
}