var winHeight = 0;
	var winWidth = 0;
	
	function getWindowSize() {
	  if( typeof( window.innerWidth ) == 'number' ) {
	    //Non-IE
	    winWidth = window.innerWidth;
	    winHeight = window.innerHeight;
	  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
	    //IE 6+ in 'standards compliant mode'
	    winWidth = document.documentElement.clientWidth;
	    winHeight = document.documentElement.clientHeight;
	  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
	    //IE 4 compatible
	    winWidth = document.body.clientWidth;
	    winHeight = document.body.clientHeight;
	  }
	  winWidth = winWidth * 0.80;
	  winHeight = winHeight * 0.80;
	  if (winWidth > 900) { winWidth = 900; }
	  if (winHeight > 550) { winHeight = 550; }
	}