转自：http://blog.csdn.net/outlook008/article/details/8763035

?

var UnloadConfirm = {};

UnloadConfirm.MSG_UNLOAD = "数据尚未保存，离开后可能会导致数据丢失\n\n您确定要离开吗？";

UnloadConfirm.set = function(a) {

? ? window.onbeforeunload = function(b) {

? ? ? ? b = b || window.event;

? ? ? ? b.returnValue = a;

? ? ? ? return a

? ? }

};

UnloadConfirm.clear = function() {

? ? fckDraft.delDraftById();

? ? window.onbeforeunload = function() {

? ? }

};

UnloadConfirm.set(UnloadConfirm.MSG_UNLOAD);