rem: enable_remove_button(); 
add: update_buttons(); 
context: function SelectActiveCharset(){   //Remove the selection in the available charsets list  var available_charsets = document.getElementById('available_charsets');  if (available_charsets.selectedItems.length > 0)      available_charsets.clearItemSelection();  enable_remove_button();} //SelectActiveCharset
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/295ea7743cd7afdac77f7443b090cf3e1ac1ea92/pref-charset.js/clean/suite/common/pref/pref-charset.js