function LinkUp(sponsor) {
  alert("Have a web site to link to the " + sponsor + " banner?  Please contact us.");
}

the_browser = "nn3";
is_mac = false;
if(document.getElementById) the_browser = "nn6";
if(document.all) the_browser = "ie";
if(document.layers) the_browser = "nn";
if(navigator.userAgent.toLowerCase().indexOf("mac")) is_mac = true;
if(navigator.userAgent.toLowerCase().indexOf("ppc")) is_mac = true;
if(navigator.userAgent.toLowerCase().indexOf("powerpc")) is_mac = true;
document.write("<script language=\"JavaScript1.2\" src=\"rx/GM_"+the_browser+".js\"></script>");