<!--
function changeBackground(id, over) {
    if (over) {
        document.getElementById(id).className=id + "_over";
    } else {
        document.getElementById(id).className=id;
    }
}

var ddmenuitem	= 0;

// open hidden layer
function mopen(id)  {	
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
}

// close un-hidden layer
function mclose() {
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// close layer when click-out
document.onclick = mclose; 
-->