Javascript call and apply methods

Example:
Copy codeThe Code is as follows:
<Script>
/**
* Animals
*/
Function Animal (){
This. name = 'amimal ';
This. showName = function (){
Alert (this. name );
};
}
/*
* Cat
*/
Function Cat (){
This. name = 'cat ';
}
Var animal = new Animal; // create an animal object
Var cat = new Cat; // create a cat object
Animal. showName. call (cat, '',''); // output cat, indicating that the current this function of showName has changed to cat
Animal. showName. apply (cat, []); // output cat
// The Difference Between the call function and the apply function is that the call syntax is function. call (obj, param1, param2 ......); The syntax of applay is function. call (obj, []/* params [] parameter array */);
</Script>