function show(whatId){
	document.getElementById(whatId).style.display = "block";
}

function hide(whatId){
	document.getElementById(whatId).style.display = "none";
}

function showHide(whatId){
	if (document.getElementById(whatId).style.display == "none"){
		document.getElementById(whatId).style.display = "block";
	}
	else {
		document.getElementById(whatId).style.display = "none";
	}
}