var buttonclass;
var buttonleftclass;
var buttonrightclass;

function Highlight(a,idx)
{
	var parent = a.parentNode;
	if (parent)
	{
		buttonclass = parent.className;
		if (idx == 1)
			parent.className = "buttonakt";
		else
			parent.className = "lowbuttonakt";
	}
	
	var x = parent.nextSibling;
	if (x)
	{
		buttonrightclass = x.className;
		if (idx == 1)
			x.className = "buttonrightakt";
		else
			x.className = "lowbuttonrightakt";
	}

	var x = parent.previousSibling;
	if (x)
	{
		buttonleftclass = x.className;
		if (idx == 1)
			x.className = "buttonleftakt";
		else
			x.className = "lowbuttonleftakt";
	}
}

function Offlight(a,idx)
{
	var parent = a.parentNode;
	if (parent)
		parent.className = buttonclass;

	var x = parent.nextSibling;
	if (x)
	{
		if (typeof(buttonrightclass) != 'undefined')
			x.className = buttonrightclass;
	}

	var x = parent.previousSibling;
	if (x)
		if (typeof(buttonleftclass) != 'undefined')
			x.className = buttonleftclass;
}