function checkSize() {
	var ie = /msie/i.test(navigator.userAgent);
	var ieBox = ie && (document.compatMode == null || document.compatMode == "BackCompat");
	var canvasEl = ieBox ? document.body : document.documentElement;
	var w = window.innerWidth || canvasEl.clientWidth;
	var h = window.innerHeight || canvasEl.clientHeight;
	document.getElementById("obj").style.height = h + "px";
}
window.onresize = checkSize;
window.onshow = checkSize;
window.onopen = checkSize;
window.onload = checkSize;