add: var rssiframe = contentWindow.document.getElementById('_mailrssiframe');   if (rssiframe) contentWindow = rssiframe.contentWindow; 
context: function SpaceHit(event){  var contentWindow = window.top._content;  if (event && event.shiftKey) {    // if at the start of the message, go to the previous one    if (contentWindow.scrollY > 0) {      contentWindow.scrollByPages(-1);    }    else {      goDoCommand("cmd_previousUnreadMsg");    }  }  else {    // if at the end of the message, go to the next one    if (contentWindow.scrollY < contentWindow.scrollMaxY) {      contentWindow.scrollByPages(1);    }    else {      goDoCommand("cmd_nextUnreadMsg");    }  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e1fb8c0b15d24311fcd87c9a7801db36a4e99ac1/mailWindowOverlay.js/buggy/mail/base/content/mailWindowOverlay.js