function OAS_RICH(position) {
if (position == 'Left') {
document.write ('<A HREF="http://oas.iop.org/RealMedia/ads/click_lx.ads/physicsweb.org/news.article/L14/473373963/Left/IOPP/PHW-LEFT-Goodfellow/Goodfellow-skyscraper.gif/524a49594d6b6a36766a454144415a73?x" target="_blank"><IMG SRC="http://imagec07.247realmedia.com/RealMedia/ads/Creatives/IOPP/PHW-LEFT-Goodfellow/Goodfellow-skyscraper.gif"  WIDTH=160 HEIGHT=600 ALT="www.goodfellow.com"  BORDER="0"></A>');
}
if (position == 'Top') {
document.write ('<A HREF="http://oas.iop.org/RealMedia/ads/click_lx.ads/physicsweb.org/news.article/L27/1627208970/Top/IOPP/PHW-TOP-Axsys/Axsys_Banner.gif/524a49594d6b6a36766a454144415a73?x" target="_blank"><IMG SRC="http://imagec07.247realmedia.com/RealMedia/ads/Creatives/IOPP/PHW-TOP-Axsys/Axsys_Banner.gif"  WIDTH=468 HEIGHT=60 ALT="www.axsys.com/precmach.php"  BORDER="0"></A>');
}
if (position == 'Middle') {
document.write ('<A HREF="http://oas.iop.org/RealMedia/ads/click_lx.ads/physicsweb.org/news.article/L27/727739720/Middle/IOPP/PHW-MID-MPU-OCR/Science_MPU_sm.gif/524a49594d6b6a36766a454144415a73?x" target="_blank"><IMG SRC="http://imagec07.247realmedia.com/RealMedia/ads/Creatives/IOPP/PHW-MID-MPU-OCR/Science_MPU_sm.gif"  WIDTH=300 HEIGHT=250 ALT="www.ocr.org.uk/physics/newalevel"  BORDER="0"><br />advertisement</A>');
}
}