/***********************************************
* Function used by Quiz lessons. Developed by
* Need-an-Article writer"kywrite (Jamie)"
***********************************************/

function visi(nr)
{
	if (document.layers)
	{
		vista = (document.layers[nr].visibility == 'hide') ? 'show' : 'hide'
		document.layers[nr].visibility = vista;
	}
	else if (document.all)
	{
		vista = (document.all[nr].style.visibility == 'visible') ? 'hidden'	: 'visible';
		document.all[nr].style.visibility = vista;
	}
	else if (document.getElementById)
	{
		vista = (document.getElementById(nr).style.visibility == 'visible') ? 'hidden' : 'visible';
		document.getElementById(nr).style.visibility = vista;

	}
}