<!--

/**
 * This function "opens" or "closes" a menu depending on whether
 * the menu is currently opened and when the user has clicked
 * on the topmenu
 * 
 * @author Christoph Eicke <eicke@yfu.de>
 */
var number;

function menuClick() {

	var i;

	// this array specified how many submenus there are for each topmenu
	var sublevels_in_toplevels = new Array();
	sublevels_in_toplevels[0] = 0;
	sublevels_in_toplevels[1] = 5;
	sublevels_in_toplevels[2] = 3;
	sublevels_in_toplevels[3] = 5;
	sublevels_in_toplevels[4] = 3;
	sublevels_in_toplevels[5] = 7;
	sublevels_in_toplevels[6] = 4;
	sublevels_in_toplevels[7] = 0;
	sublevels_in_toplevels[8] = 5;

	// check if the current menu is "hidden"
	if(document.getElementById("sublevel_" + number + "1").className == "hidden")
	{
		// show all items in the current topmenu
		for(i=0;i<=sublevels_in_toplevels[number];i++)
		{
			document.getElementById("sublevel_" + number + i).className = "visible";
			document.getElementById("sublevel_" + number + i + "s").className = "visible";
		}
	} else {
		// hide all items in the current topmenu
		for(i=0;i<=sublevels_in_toplevels[number];i++)
		{
			document.getElementById("sublevel_" + number + i).className = "hidden";
			document.getElementById("sublevel_" + number + i + "s").className = "hidden";
		}
	}
	
	return 1;
}

function sublevel_over(number)
{
	document.getElementById("sublevel_" + number).className = "over";
	return 1;
}

function sublevel_out(number)
{
	document.getElementById("sublevel_" + number).className = "visible";
	return 1;
}
//-->