var mouseX 
var mouseY 

function Tooltip(foto){ 
document.getElementById('pop').innerHTML="<img height='80' width='80' src='"+foto+"'/>" 
} 

function Show(obj){ 
document.getElementById(obj).style.display="block"; 
} 

function Hide(obj){ 
document.getElementById(obj).style.display="none"; 
} 

function coords(e){ 
if(!e) e=window.event; 
mouseX = e.clientX; 
mouseY = e.clientY; 
document.getElementById('pop').style.left=mouseX+5+'px';
document.getElementById('pop').style.top=mouseY+5+'px';
} 
document.onmousemove=coords;