add: button.setAttribute("accesskey", document.documentElement.getAttribute("creditsaccesskey")); 
context: function switchPage(aEvent){  var button = aEvent.target;  if (button.localName != "button")    return;  var iframe = document.getElementById("creditsIframe");  if (gSelectedPage == 0) {     iframe.setAttribute("src", "chrome://browser/content/credits.xhtml");    button.setAttribute("label", document.documentElement.getAttribute("aboutlabel"));    gSelectedPage = 1;  }  else {    iframe.setAttribute("src", "");     button.setAttribute("label", document.documentElement.getAttribute("creditslabel"));    gSelectedPage = 0;  }  var modes = document.getElementById("modes");  modes.setAttribute("selectedIndex", gSelectedPage);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/b237f353c8611c0b0555c1627426cbc0e3fb76be/aboutDialog.js/clean/browser/base/content/aboutDialog.js