{

    var elem = document.getElementById("pageCell")
    var screenres = document.documentElement.clientWidth;
    var marg = ((screenres - 900)/2);
    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;
 	   myHeight = document.documentElement.clientHeight;
	  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
	    //IE 4 compatible
  	  myWidth = document.body.clientWidth;
 	   myHeight = document.body.clientHeight;
	  }

    elem.style.marginLeft=(((myWidth - 900)/2)-10)+'px';
}