function showBox(selected_box)
{
	var boxes = 3;

	for( i=1; i<=boxes; i++ )
	{
		tab_class_name = document.getElementById('tab' + i).className;

		if( i == selected_box )
		{
			document.getElementById('box' + i).style.display = 'block';
			if( tab_class_name.substring(tab_class_name.length - 7, tab_class_name.length) != 'activ')
			{
				document.getElementById('tab' + i).className = tab_class_name + 'activ';
			}
		}
		else
		{
			document.getElementById('box' + i).style.display = 'none';
			if( tab_class_name.substring(tab_class_name.length - 7, tab_class_name.length) == 'activ')
			{
				document.getElementById('tab' + i).className = tab_class_name.substring(0, tab_class_name.length - 7);
			}
		}
	}
}

function reg_showbox(selected_box)
{
	var boxes = 4;

	for( i=1; i<=boxes; i++ )
	{
		tab_class_name = document.getElementById('reg_tab' + i).className;

		if( i == selected_box )
		{
			document.getElementById('reg_box' + i).style.display = 'block';
			if( tab_class_name.substring(tab_class_name.length - 7, tab_class_name.length) != 'activ')
			{
				document.getElementById('reg_tab' + i).className = tab_class_name + 'activ';
			}
		}
		else
		{
			document.getElementById('reg_box' + i).style.display = 'none';
			if( tab_class_name.substring(tab_class_name.length - 7, tab_class_name.length) == 'activ')
			{
				document.getElementById('reg_tab' + i).className = tab_class_name.substring(0, tab_class_name.length - 7);
			}
		}
	}
}