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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.

attribute : It called attribute within object

1. var a // global variable funtion aaa(){ var a // local variable } 2. var a // global variable funtion aaa(){ var a //local variable a // global variable because there is no var 3. var a // global variable funtion aaa(){ var a //local variable alert(a) //it returns local because it calls the nearest one 4. var a // global variable funtion aaa(){ alert(a) //it returns global 5. var a // global ..

.push() : push some informatino into the array, a commend adds a single value on the tail .concat() : add more than a single value on the tail .unshift() : add value on the start point into the array .splice(index, howmany, element1, ..., elementN) : add value in somewhere in the middle of array. It changes the contents of an array by removing or replacing existing elements and/or adding new ele..