var last="nop";
function show_bar(ev, imgid) {

if (last != "nop") {document.getElementById(last).style.visibility="hidden"; last="nop";}

last=imgid;
MouseX = ev.clientX + document.body.scrollLeft;
MouseY = ev.clientY + document.body.scrollTop;
obj = document.getElementById(imgid);

obj.style.top = MouseY - 205;
obj.style.left = MouseX ;
obj.style.visibility = "visible";

}

function hide_bar(imgid) {

document.getElementById(imgid).style.visibility="hidden";
last="nop";
}