function menu_popUp(event, idDiv) {
        objDiv = document.getElementById(idDiv);
/*        objDiv.style.top=(event.clientY-15)+"px";
        objDiv.style.left=(160)+"px";*/
        objDiv.style.width=(280)+"px";
        objDiv.style.visibility="visible";  
}

function menu_popDown(idDiv) {
        objDiv = document.getElementById(idDiv);
        objDiv.style.visibility="hidden";
}