fix typos

Author: schneems

README.md

@@ -246,7 +246,7 @@ We are telling the document object that when it is ready, call the function that
 
 Wow that was a lot of explanation for a very little bit of code. The reason I want to talk about it here, is that javascript uses callbacks heavily. This type of programming can be refered to as event based programming, since we are waiting for an event (the document is ready) before we run our code.
 
-Callbacks especially can be ticky, so lets take a look at another real world example. Let's say you are looking for a new job and you go into an interview. You give them your phone number so that when they make a decision they can call you and you can celebrate if you got the job, or be sad if you didn't. The altertnative if that callback mechanism didn't exist would be to call the company every few minutes to see if they made a decision. This would render you incapable of doing anything else, and your life would be rendered useless untill they make a decision. This type of behavior is refered to as polling, since you are polling the company to ask if they have made a decision. Callbacks in code work in a similar way.
+Callbacks especially can be tricky, so lets take a look at another real world example. Let's say you are looking for a new job and you go into an interview. You give them your phone number so that when they make a decision they can call you and you can celebrate if you got the job, or be sad if you didn't. The alternative if that callback mechanism didn't exist would be to call the company every few minutes to see if they made a decision. This would render you incapable of doing anything else, and your life would be rendered useless until they make a decision. This type of behavior is referred to as polling, since you are polling the company to ask if they have made a decision. Callbacks in code work in a similar way.
 
 
 ## 2)  javascript and ERB