function mouseover_menuepoint ()	{
	document.getElementById("hidden_div").style.visibility = "hidden";
}
function openPopUp() {
	window.open('/tris/','','width=1014,height=618,scrollbars=no');
}
function toggleOverlay(status){
    if (status == null) {
        status = 'show';
    }
    if (status == 'show') {
        document.getElementById('teaserOverlay').style.display = 'block';
        document.getElementById('teaserImage').style.opacity = '.50';
        document.getElementById('teaserImage').style.filter = 'alpha(opacity=50)';
    } else {
        document.getElementById('teaserOverlay').style.display = 'none';
        document.getElementById('teaserImage').style.opacity = '1';
        document.getElementById('teaserImage').style.filter = 'alpha(opacity=100)';
    }
}