function showPop(obj,thisitem) {

 var divname = "pop"+thisitem;
 var thediv = document.getElementById(divname);
 thediv.style.visibility = 'visible';
 thediv.style.top = (obj.offsetTop + 0) + 'px';
 thediv.style.left = (obj.offsetLeft + 0) + 'px';
 }

function hidePop(thisitem) {
 var divname = "pop"+thisitem;
 var thediv = document.getElementById(divname);
 thediv.style.visibility = 'hidden';
 }