var jscript;

  if ( (navigator.userAgent.indexOf("a/3",6) == -1) &&
       (navigator.userAgent.indexOf("a/4",6) == -1) ) {
    jscript = 0;
  }
  else {
    jscript = 1;
  }

  if ( jscript ) {

    vacatures_on                   = new Image;
    vacatures_on.src               = "images/vacatures_blauw_groot.gif";
    vacatures_off                  = new Image;
    vacatures_off.src              = "images/vacatures_blauw.gif";

    info_on                   = new Image;
    info_on.src               = "images/info_blauw_groot.gif";
    info_off                  = new Image;
    info_off.src              = "images/info_blauw.gif";

    contact_on                   = new Image;
    contact_on.src               = "images/contact_blauw_groot.gif";
    contact_off                  = new Image;
    contact_off.src              = "images/contact_blauw.gif";

    over_on                   = new Image;
    over_on.src               = "images/over_blauw_groot.gif";
    over_off                  = new Image;
    over_off.src              = "images/over_blauw.gif";

    all_on                   = new Image;
    all_on.src               = "images/allg.gif";
    all_off                  = new Image;
    all_off.src              = "images/allk.gif";

    cat_on               = new Image;
    cat_on.src           = "images/catg.gif";
    cat_off              = new Image;
    cat_off.src          = "images/catk.gif";

    prod_on              = new Image;
    prod_on.src          = "images/prodg.gif";
    prod_off             = new Image;
    prod_off.src         = "images/prodk.gif";

    merk_on                    = new Image;
    merk_on.src                = "images/merkg.gif";
    merk_off                   = new Image;
    merk_off.src               = "images/merkk.gif";

    merkh_on                   = new Image;
    merkh_on.src               = "images/merkgh.gif";
    merkh_off                  = new Image;
    merkh_off.src              = "images/merkkh.gif";

    prodh_on                   = new Image;
    prodh_on.src               = "images/prodgh.gif";
    prodh_off                  = new Image;
    prodh_off.src              = "images/prodkh.gif";

    cath_on                   = new Image;
    cath_on.src               = "images/catgh.gif";
    cath_off                  = new Image;
    cath_off.src              = "images/catkh.gif";

    allh_on                   = new Image;
    allh_on.src               = "images/allgh.gif";
    allh_off                  = new Image;
    allh_off.src              = "images/allkh.gif";

}
  function imgAdj(imgDocID, mouseMov) {

    if ( jscript ) {
      if ( mouseMov == "in" ) {
         document.images[imgDocID].src = eval(imgDocID + "_on.src");
       
      }
      if ( mouseMov == "out" ) {
         document.images[imgDocID].src = eval(imgDocID + "_off.src");
         
      }
    }
  }