rem:  document.getElementById("pop3.deleteMailLeftOnServer").disabled = !checked; 
add: var locked = getAccountValueIsLocked(document.getElementById("pop3.leaveMessagesOnServer")); document.getElementById("pop3.deleteMailLeftOnServer").disabled = locked || !checked ; 
context: function setupMailOnServerUI(){    var checked = document.getElementById("pop3.leaveMessagesOnServer").checked;   document.getElementById("pop3.deleteMailLeftOnServer").disabled = !checked;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/4908a3ccdc3d63b456643d07405cd5bdb98600be/am-server.js/buggy/mailnews/base/prefs/resources/content/am-server.js