/*  Change the visibility of an object on and off. 
 *
 *  <dt onClick="blocking('idtag')"> ...
 *     <dd class="noshow" id="idtag"> ...
 *
 *  In this case, "noshow" is a style that starts the element as invisible.
 */

function blocking(tag)
{
	if (document.getElementById) //  Netscape, Mozilla, etc.
	{
		var state = document.getElementById(tag).style.display;
	}
	else if (document.all)      //  IE, Konqueror, etc.
	{
		var state = document.all[tag].style.display;
	}

	var newState = "";

	if ( state == "block")
	{
		newState = "none";
	} else {
		newState = "block";
	}
	if (document.getElementById)
	{
		document.getElementById(tag).style.display = newState;
	}
	else if (document.all)
	{
		document.all[tag].style.display = newState;
	}
}