function oculta(num) { document.getElementById("div"+num+"").style.visibility="hidden"; }
function mostra(num) { document.getElementById("div"+num+"").style.visibility="visible"; }

function pegaobj(oEl) {
var oEl = document.getElementById( oEl );
var rect = oEl.getBoundingClientRect();
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
var targetLeft = rect.left + scrollLeft;
var targetTop = rect.top + scrollTop;
var targetWidth = rect.right - rect.left;
var targetHeight = rect.bottom - rect.top;
return Array(targetLeft, targetTop, targetWidth, targetHeight);
}

function mudap_ing(obj,rel) {
var arr = pegaobj(rel);
var x = arr[0];
var y = arr[1];
var objeto_n = document.getElementById("div"+obj+"");
objeto_n.style.left = x-35;
objeto_n.style.top = y+18;
mostra(obj);
}