demo：

function FCKeditor_OnComplete( editorInstance )

{

editorInstance.EditorDocument.attachEvent("onkeydown", editor_keydown);

editorInstance.EditorDocument.attachEvent("onkeyup", editor_keyup);

}

function editor_keydown()

{

var oEditor = FCKeditorAPI.GetInstance('inputmsg') ;

var keycode = oEditor.EditorWindow.event.keyCode;

if(keycode==13) {

}

}

function clearInput()

{

var oEditor = FCKeditorAPI.GetInstance('inputmsg') ;

oEditor.Commands.GetCommand( "NewPage" ).Execute(); // oEditor.SetHTML("") ;

}

function editor_keyup()

{

var oEditor = FCKeditorAPI.GetInstance('inputmsg') ;

var keycode = oEditor.EditorWindow.event.keyCode;

if(keycode==13) {

clearInput();

}

}