python - Alarm Clock that opens a webbrowser in python using Tkinter and displays time

Question

I'm very new to Python, and was trying to figure out a way of making an alarm clock that could display time using Tkinter, and would open a url when the desired time was reached. The issue as far as I can tell is that the program skips the while loop, and so the url never opens. I know that it can be improved in a lot of ways, but for now I really just want to know how to get the url to open at the entered time.

from Tkinter import *
import time
import webbrowser

class App:
    def __init__(self,master):
        frame=Frame(master)
        frame.pack()

        self.w=Label(frame,text="",bg="red")
        self.w.pack(side=LEFT)

        self.entry=Entry(frame)
        self.entry.pack(side=LEFT)


        self.Button1=Button(frame,text="Enter Hour Here",command=self.hour)
        self.Button1.pack(side=LEFT)


        self.entry2=Entry(frame)
        self.entry2.pack(side=LEFT)

        self.Button2=Button(frame,text="Enter Minute Here",command=self.minutes)
        self.Button2.pack(side=LEFT)




    def hour(self):
        None

    def minutes(self):
        self.update_time()

    def checktime(self):
        alarmminute=self.entry2.get()
        alarmhour=self.entry.get()
        j=0
        while j<1:
            if time.localtime().tm_hour==alarmhour and time.localtime().tm_min==alarmminute:
                webbrowser.open("google.com")
            else:
                j=j+1
        self.update_time()

    def update_time(self):
        now = time.strftime("%H:%M:%S")
        self.w.config(text=now)
        root.after(1000, self.checktime)

root=Tk()
app=App(root)
root.mainloop()