[Moo] Automatically resizing IFrame in IE

[ZsZs]

Hi,

I'm using the code below to automatically adjust an iframe's heigh
according to it's content.

   tryToDecreaseHeight: function(){
      while( this.iframe.contentWindow.getScroll().y == 0 &&
this.iframe.getStyle( 'height' ).toInt() > 0 ) {
         var currentHeight = this.iframe.getStyle( 'height' ).toInt();
         var decreasedHeight = ( currentHeight -
this.options.estimatedRowHeight ) >= 0 ? currentHeight -
this.options.estimatedRowHeight : 0;
         this.iframe.setStyle( 'height', decreasedHeight );
         this.iframe.contentWindow.scrollTo( null, 1 );
      }

      if( this.iframe.contentWindow.getScroll().y > 0 )
         this.iframe.setStyle( 'height',
this.iframe.getStyle( 'height' ).toInt() +
this.options.estimatedRowHeight );
   }.protect(),

Please note that there is a similar tryToIncreaseHeight() method.
Both are working properly in Chrome, FF, Safari, but in IE the line:
         this.iframe.contentWindow.scrollTo( null, 1 );
doesn't changes this.iframe.contentWindow.getScroll().y value.

Any idea what is special in IE?
Thank you,
Zsolt