var ie = /msie/i.test(navigator.userAgent);
var ieBox = ie && (document.compatMode == null || document.compatMode == "BackCompat");
	   
function checkSize() 
{
	var canvasEl = ieBox ? document.body : document.documentElement;
	var w = window.innerWidth || canvasEl.clientWidth;
	var h = window.innerHeight || canvasEl.clientHeight;
	
	if (h>=612)
	{
		document.getElementById("obj").style.height = Math.max(0, 100) + "%";
	}
	else
	{
		document.getElementById("obj").style.height = "612px";
	}
	if (w>=990)
	{
		document.getElementById("obj").style.width = Math.max(0, 100) + "%";
	}
	else
	{
		document.getElementById("obj").style.width = "990px";
	}
}

window.onresize = checkSize;
window.onshow = checkSize;
window.onopen = checkSize;