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Prototype : It provides ingeritance, objects can have a prototype object, which acts as a template object that it inherits methods and properties from.

Constructor : The function for creating object, object creator. this : Within the function, it indicates the object that function belong to. The object which creator created.

Object : One program consists of several types of logic. This logic can be groupping which consists of associated variables, methods. This is an object. It can be reused, it is a sort of components when it reused. So making a good object means recyclable in other places. For example, the initial computer which every parts such as monitor, harddist, keyboard is combined. But the newest one has ea..

Arguments : An array-like object which accessible inside functions that contains the value of the arguments passed to that function Function : A sort of object, and object has property. If property has function, we can call this property as method.

Ajax : It stands for Asynchronous Javascript And XML. When click some button on the webpage, the webpage does not change. The web browser make request to the server on the background. This is asynchronous process. Closure : It gives tou access to an outer function's scope from an inner function.