function fetch_object(idname)
{
	if (document.getElementById)
	{
		return document.getElementById(idname);
	}
	else if (document.all)
	{
		return document.all[idname];
	}
	else if (document.layers)
	{
		return document.layers[idname];
	}
	else
	{
		return null;
	}
}
function toggle_collapse(objid)
{
	obj = fetch_object('collapseobj_' + objid);
	img = fetch_object('collapseimg_' + objid);
	cel = fetch_object('collapsecel_' + objid);

	if (!obj)
	{
		// nothing to collapse!
		if (img)
		{
			// hide the clicky image if there is one
			img.style.display = 'none';
		}
		return false;
	}

	if (obj.style.display == '')
	{
		obj.style.display = 'none';
		if (cel)
		{
			cel_re = new RegExp("^(thead|cat)$");
			cel.className = cel.className.replace(cel_re, '$1');
		}
	}
	else
	{
		obj.style.display = '';
		if (cel)
		{
			cel_re = new RegExp("^(thead|cat)$");
			cel.className = cel.className.replace(cel_re, '$1_collapsed');
		}
	}
	return false;
}