function showContent() {
for (var i=0; i<showContent.arguments.length; i++)
{
	var element = document.getElementById(showContent.arguments[i]);
	element.style.display = "block";
}
}

function hideContent() {
for (var i=0; i<hideContent.arguments.length; i++)
{
	var element = document.getElementById(hideContent.arguments[i]);
	element.style.display = "none";
}
}