function OAS_RICH(position) {
if (position == 'Right1') {
document.write ('<div class="ad"><div STYLE="color: #52819B; font-size: 10px; text-align: center;" >ADVERTISEMENT</div><br />\n');
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}
if (position == 'Right2') {
document.write ('<div class="ad"><div STYLE="color: #52819B; font-size: 10px; text-align: center;" >ADVERTISEMENT</div><br />\n');
document.write ('<a href="http://oascentral.sciencemag.org/RealMedia/ads/click_lx.ads/www.sciencemag.org/content/278/5337/369.4.short/L18/387453870/Right2/AAAS/SOL-SIG-CAR-HseIntroSTM-091005/STM-Launch-160x600_091005.HTML.html/6973494f6d6b74484376344143533459?387453870" target="_blank"><img src="http://imagec14.247realmedia.com/RealMedia/ads/Creatives/AAAS/SOL-SIG-CAR-HseIntroSTM-091005/STM-Launch-160x600_091005.gif" BORDER=0 WIDTH=160 HEIGHT=600 alt="Advertisement"></a></div>\n');
}
if (position == 'Top') {
document.write ('<A HREF="http://oascentral.sciencemag.org/RealMedia/ads/click_lx.ads/www.sciencemag.org/content/278/5337/369.4.short/L18/113032190/Top/AAAS/SOL-CAR-SIG-MC-Trialone-House-Ad-Ldr-Twr-110503/AAAS-728x90-banner-r4.gif/6973494f6d6b74484376344143533459?x" target="Science Membership Central"><IMG SRC="http://imagec14.247realmedia.com/RealMedia/ads/Creatives/AAAS/SOL-CAR-SIG-MC-Trialone-House-Ad-Ldr-Twr-110503/AAAS-728x90-banner-r4.gif/1304455587"  WIDTH=728 HEIGHT=90 ALT=""  BORDER="0"></A>');
}
}
