// ===============================================
// UTILS
// ===============================================

id = function(o) { return document.getElementById(o);}
px = function (x) { return ''.concat(Math.round(x), 'px');}
pxLeft = function(o) { for (var x = 0; o != null; o = o.offsetParent) x += o.offsetLeft; return x;}
pxTop = function(o) { for (var x = 0; o != null; o = o.offsetParent) x += o.offsetTop; return x;}
addEvent = function (o, e, f) { var r = false; if (window.addEventListener) { o.addEventListener(e, f, false); r = true;} else if (window.attachEvent) { r = o.attachEvent('on' + e, f);}
return r;}