var pageWidth = window.innerWidth;var pageHeight = window.innerHeight;if(typeof pageWidth != 'number'){    if(document.compatMode == 'CSS1Compat'){        pageWidth = document.documentElement.clientWidth;            pageHeight = document.documentElement.clientHeight;                } else{        pageWidth = document.body.clientWidth;        pageHeight = document.doby.clientHeight;            }            }