Rollover not working

[bigbird3156]

Hi, can anyone tell me why this bit of code is not working...

it is supposed to create an image rollover with a link to a new page... passing the value of 'rec_num'...

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

<a href="designer_bio.php?rec_num=<?php echo $row_view_catalogue['rec_num']; ?>"><img src="../pics/bio_up.gif" alt="View Bio" name="Bio_button" width="79" height="34" id="Bio_button" onmouseover="MM_swapImage('Bio_button','','../pics/bio_ov.gif',1)" onmouseout="MM_swapImgRestore()" /></a>

The link works, just not the rollover...

The Bird from Down Under- Bigbird 3156
Programmer?? - I thought the option was pretender not programmer!!