Kruhový rámček za obrázkom po nájazde kurzoru

<script>
function zobraz(idecko){
el=document.getElementById(idecko).style;
el.display='block';
}
function skry(idecko){
el=document.getElementById(idecko).style;
el.display='none';
}

function daj(co){
document.getElementById('ram2').value=(co); }
<!--

// Detect if the browser is IE or not.
// If it is not IE, we assume that the browser is NS.
var IE = document.all?true:false

// If NS -- that is, !IE -- then set up for mouse capture
if (!IE) document.captureEvents(Event.MOUSEMOVE)

// Set-up to use getMouseXY function onMouseMove
document.onmousemove = getMouseXY;

// Temporary variables to hold mouse x-y pos.s
var tempX = 0
var tempY = 0

// Main function to retrieve mouse x-y pos.s

function getMouseXY(e) {
  if (IE) { // grab the x-y pos.s if browser is IE
    tempX = event.clientX + document.body.scrollLeft
    tempY = event.clientY + document.body.scrollTop
  } else {  // grab the x-y pos.s if browser is NS
    tempX = e.pageX
    tempY = e.pageY
  }  
  // catch possible negative values in NS4
  if (tempX < 0){tempX = 0}
  if (tempY < 0){tempY = 0}  

  tempY=tempY-25;
  tempX=tempX+15;
  document.getElementById('ram').style.left = tempX + 'px';
   document.getElementById('ram').style.top = tempY + 'px';

  return true
}

//-->
</script>