var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth+16;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth+16;
    myHeight = document.body.clientHeight;
  }
    
	var newWidth = (myWidth - 923)/2;
	var newestWidth =  newWidth + 584;
	d = newestWidth.toString();
	e=document.getElementById("bubble");
	e.style.left = d + 'px';