function display(elementToDisplay)
{
	document.getElementById(elementToDisplay).style.display='block';
}

function hide(elementToDisplay)
{
	document.getElementById(elementToDisplay).style.display='none';
}

function individualLecture(checked)
{
	if(checked == 1)
	{
		hide("not_individual");
	}
	else
	{
		display("not_individual");
	}
}