document.compatMode CSS1Compatvar width window.innerWidthvar height window.innerHeightif
document.compatMode == "CSS1Compat"
var width = window.innerWidth;var height = window.innerHeight;if(typeof width != "Number"){ // IE width = document.compatMode == "CSS1Compat" ? document.documentElement.clientWidth : document.body.clientWidth; height = document.compatMode == "CSS1Compat" ? document.documentElement.clientHeight : document.body.clientHeight;}alert(width + "-------" + height)