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>=994){
       	  document.getElementById("obj").style.width = Math.max(0, 100) + "%";
	   } else {
	   	  document.getElementById("obj").style.width = "994px";
	   }
	   
     }

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