function GetBrowserCurrentWidth() 
{
  var myWidth = 0;
  if( typeof( window.innerWidth ) == 'number' ) 
  {
     //Non-IE
     myWidth = window.innerWidth - 20;
  } else if( document.documentElement &&
      ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) 
  {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
  }
  else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) 
  {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
  }
  return myWidth;
}

function GetBrowserCurrentHeight() 
{
  var myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) 
  {
    //Non-IE
    myHeight = window.innerHeight;
  } 
  else if( document.documentElement &&
      ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) 
  {
     //IE 6+ in 'standards compliant mode'
     myHeight = document.documentElement.clientHeight;
  } 
  else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) 
  {
    //IE 4 compatible
    myHeight = document.body.clientHeight;
  }
  return myHeight;
}