修复了bug407：划词朗读时，会结束之前的朗读，直接重新开始新的划词朗读。

app/Login.py

@@ -5,10 +5,6 @@ from UseSqlite import InsertQuery, RecordQuery
 path_prefix = '/var/www/wordfreq/wordfreq/'
 path_prefix = './'  # comment this line in deployment
 
-def verify_pass(newpass,oldpass):
-    if(newpass==oldpass):
-        return True
-
 
 def verify_user(username, password):
     rq = RecordQuery(path_prefix + 'static/wordfreqapp.db')
@@ -51,8 +47,6 @@ def change_password(username, old_password, new_password):
     if not verify_user(username, old_password):  # 旧密码错误
         return False
     # 将用户名和密码一起加密，以免暴露不同用户的相同密码
-    if verify_pass(new_password,old_password): #新旧密码一致
-        return False
     password = md5(username + new_password)
     rq = InsertQuery(path_prefix + 'static/wordfreqapp.db')
     rq.instructions_with_parameters("UPDATE user SET password=:password WHERE name=:username", dict(

app/static/js/fillword.js

@@ -15,6 +15,7 @@ function fillinWord(){
 }
 document.getElementById("text-content").addEventListener("click", fillinWord, false);
 function read(s){
+   reader.cancel();
    var msg = new SpeechSynthesisUtterance(s);
    reader.speak(msg);
 }