function myOver(idname, topic)	{
	myChange(idname, 'nav1_'+topic);
}

function myOut(idname, topic)	{
	myChange(idname, 'nav1');
	window.setTimeout('init()',2000); // 2sec	
}

function myChange(idname, classe) {
    if (w3c)    {
        document.getElementById(idname).className = classe;
    }
}