function hidediv(id,pid) {
	//safe function to hide an element with a specified id
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'none';
		if (document.getElementById(pid))
			document.getElementById(pid).src = '/skins/default/en/images/plus.gif';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'none';
		}
		else { // IE 4
			document.all.id.style.display = 'none';
		}
	}
}

function showdiv(id,pid) {
	//safe function to show an element with a specified id
		  
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
		if (document.getElementById(pid))
			document.getElementById(pid).src = '/skins/default/en/images/minus.gif';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'block';
		}
		else { // IE 4
			document.all.id.style.display = 'block';
		}
	}
}

function togglehideshow(id,pid) {
	switch (document.getElementById(id).style.display){
		case 'none':
			showdiv(id,pid);
			break;
		case 'block':
			hidediv(id,pid);			
			break;
		default:
			hidediv(id,pid);
	}
}