function gety(elem)
{
 y = 0;
 do { y += elem.offsetTop; }
 while((elem = elem.offsetParent) != null);
 return y;
}

function mover(elem){
 document.getElementById(elem).style.backgroundColor = "#333333";
}

function mout(elem){
 document.getElementById(elem).style.backgroundColor = "transparent";
}

function msover(elem){
 var sy = 0;
 mover(elem);
 if (document.getElementById("s" + elem)) {
 sy = gety(document.getElementById(elem)) - 115;
 document.getElementById("s" + elem).style.top = sy+'px';
 document.getElementById("s" + elem).style.visibility = "visible";
 }
}

function msout(elem){
 mout(elem);
 if (document.getElementById("s" + elem)) {
 document.getElementById("s" + elem).style.visibility = "hidden";
 }
}