function a(i){
	a(i);
}
function a(i){
	switch(i){
		case 1:
		document.getElementById("js").style.display="block";
		document.getElementById("js_1").style.display="none";
		break; 
		case 2:
		document.getElementById("js").style.display="none";
		document.getElementById("js_1").style.display="block";
		break; 
	}
}

function b(i){
	b(i);
}
function b(i){
	switch(i){
		case 1:
		document.getElementById("nav").style.display="block";
		document.getElementById("nav_a").style.display="none";
		break; 
		case 2:
		document.getElementById("nav").style.display="none";
		document.getElementById("nav_a").style.display="block";
		break; 
	}
}

function c(i){
	c(i);
}
function c(i){
	switch(i){
		case 1:
		document.getElementById("hte").style.display="block";
		document.getElementById("hte_a").style.display="none";
		break; 
		case 2:
		document.getElementById("hte").style.display="none";
		document.getElementById("hte_a").style.display="block";
		break; 
	}
}

function d(i){
	d(i);
}
function d(i){
	switch(i){
		case 1:
		document.getElementById("tyr").style.display="block";
		document.getElementById("tyr_a").style.display="none";
		break; 
		case 2:
		document.getElementById("tyr").style.display="none";
		document.getElementById("tyr_a").style.display="block";
		break; 
	}
}