rem: msgPaneData.ViewAllHeadersToolbar.setAttribute("collapsed", "true"); msgPaneData.ViewAllHeadersBox.setAttribute("collapsed", "true");  var node = document.getElementById("headerPart1"); 
add: var node = document.getElementById("collapsedHeaderView"); 
context: function HideMessageHeaderPane(){  msgPaneData.ViewAllHeadersToolbar.setAttribute("collapsed", "true");  msgPaneData.ViewAllHeadersBox.setAttribute("collapsed", "true");  var node = document.getElementById("headerPart1");  if (node)    node.setAttribute("collapsed", "true");  node = document.getElementById("headerPart2");  if (node)    node.setAttribute("collapsed", "true");  node = document.getElementById("headerPart3");  if (msgPaneData.UserAgentToolbar)    msgPaneData.UserAgentToolbar.setAttribute("collapsed", "true");}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c67a0430b1f6a28483542ee1bfc4325f6249ad46/msgHdrViewOverlay.js/clean/mailnews/base/resources/content/msgHdrViewOverlay.js