function blocking(nr)
{
	// Netscape 4
	if (document.layers) {
		document.layers[nr].visibility = (document.layers[nr].visibility == 'hide') ? 'show' : 'hide';
	}
	// Explorer 4+
	else if (document.all) {
		document.all[nr].style.display = (document.all[nr].style.display == 'none') ? 'block' : 'none';
	}
	// Mozilla, Explorer 5+
	else if (document.getElementById) {
		document.getElementById(nr).style.display = (document.getElementById(nr).style.display == 'none') ? 'block' : 'none';
	}
}

function container_start(nr)
{
	if (document.layers) {
		document.write('<ilayer id="' + nr + '" visibility=hide>')
	}
	else if (document.all || document.getElementById) {
		document.write('<div id="' + nr + '" style="display: none;">')
	}
}

function container_end()
{
	if (document.layers) {
		document.write('</ilayer>')
	}
	else if (document.all || document.getElementById) {
		document.write('</div>')
	}
}