iPad Air nhanh hơn nhiều so với iPad 4

//SETTING UP OUR POPUP //0 means disabled; 1 means enabled; var popupStatus = 0; //loading popup with jQuery magic! function loadPopup(){ //loads popup only if it is disabled if(popupStatus==0){ $("#backgroundPopup").css({ "opacity": "0.7" }); $("#backgroundPopup").fadeIn("slow"); $("#popup_email").fadeIn("slow"); popupStatus = 1; } } //disabling popup with jQuery magic! function disablePopup(){ //disables popup only if it is enabled if(popupStatus==1){ $("#backgroundPopup").fadeOut("slow"); $("#popup_email").fadeOut("slow"); popupStatus = 0; } } // Centering popup function centerPopup(){ //request data for centering var windowWidth = document.documentElement.clientWidth; var windowHeight = document.documentElement.clientHeight; var popupHeight = $("#popup_email").height(); var popupWidth = $("#popup_email").width(); //centering $("#popup_email").css({ "position": "fixed", "top": windowHeight/2-popupHeight/2, "left": windowWidth/2-popupWidth/2 }); //only need force for IE6 $("#backgroundPopup").css({ "height": windowHeight }); } //Press Escape event! $(document).keypress(function(e){ if(e.keyCode==27 && popupStatus==1){ disablePopup(); } }); $(document).ready(function(){ // Loadding Popup $(".list_share_icon ul li .icon_letter").click(function(){ //centering with css centerPopup(); //load popup loadPopup(); }); }); var po = document.cre-ateElement('script');po.type = 'text/javascript';po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0];s.parentNode.in-sertBefore(po, s);