function goBack() {
	if (history.length > 1) {
		history.go(-1);
	} else {
		location.replace('index.php');
	}
	
}


function showHide(elementID, show)
{
	var el = document.getElementById(elementID);

	if(show)
	{
		el.style.display = '';
	}
	else
	{
		el.style.display = 'none';
	}

	return false;
}