image = new Array(4);
image[0] = '<a HREF="testery/alkometra20.html"><IMG SRC="pix/testery/alka2.gif" WIDTH="70" HEIGHT="100" BORDER="0" ALT="Alkometr A2.0"></A>';
image[1] = '<a HREF="testery/alkosensoriv.html"><IMG SRC="pix/testery/as_iv_m.gif" WIDTH="67" HEIGHT="83" BORDER="0" ALT="Alkosensor IV"></A>';
image[2] = '<a HREF="testery/blowin.html"><IMG SRC="pix/testery/blowin_m.jpg" WIDTH="58" HEIGHT="90" BORDER="0" ALT="Blowin"></A>';
image[3] = '<a HREF="testery/s-tech.html"><IMG SRC="pix/testery/s-tech_m.jpg" WIDTH="58" HEIGHT="90" BORDER="0" ALT="S-Tech"></A>';


index = Math.floor(Math.random() * image.length);

document.write( image[index] );