MouseOver + FIX fejl i IE5.2 til Mac OS X

Hvorfor kan dette script ikke fastholde FIX på det imageslink der klikkes på i IE 5.2 til Mac (OS X) ?
Der virker fint i IE 6.0 til PC

MVH.

Lars



<script language="JavaScript">
<!--
if (document.images) {

  img1_on = new Image();
  img1_on.src = "../pictures/me2.gif";
  img1_off = new Image();
  img1_off.src = "../pictures/me.gif";
 
  img2_on = new Image();
  img2_on.src = "../pictures/work2.gif";
  img2_off = new Image();
  img2_off.src = "../pictures/work.gif";
 
}

var  iNavn = "";

function ms( imagename, action ) {
  if ( !document.images || iNavn == imagename ) return;
  if ( 'fix' == action ) {
      if ( iNavn != "" ) {
          temp = iNavn;
          iNavn = "";
          ms( temp, 'off' );
      }
      iNavn = imagename;
  } else
      document.images[imagename].src = window[ imagename +'_' +action ].src;
  }

// -->
</script>


    <a href="#" onfocus="this.blur( )" onMouseOver="ms('img1', 'on')" onMouseOut="ms('img1', 'off')" onClick="ms('img1', 'fix');parent.main.location='me.htm'; parent.index.location='blank.htm'; parent.workmenu.location='blank.htm'; return false;">
    <img name="img1" src="../pictures/me2.gif" border="0" width="20" height="9"></a>
   

    <a href="#" onfocus="this.blur( )" onMouseOver="ms('img2', 'on')" onMouseOut="ms('img2', 'off')" onClick="ms('img2', 'fix');parent.main.location='work.htm'; parent.index.location='workindex.htm'; parent.workmenu.location='top2.htm'; return false;">
    <img name="img2" src="../pictures/work.gif" border="0" width="20" height="9"></a>