Complete these methods in Javascript

you cannot use the pre-built-in in methods in java write it from scratch using the parameters given

/**

* Returns the 1-based position where an object is on this stack.

* If the object o occurs as an item in this stack, this method

* returns the distance from the top of the stack of the occurrence

* nearest the top of the stack; the topmost item on the stack is

* considered to be at distance 1. The equals method is used to

* compare o to the items in this stack.

*

* Example:

*

 
 * s.push(4);
 
 * s.push(5);
 
 * s.push(6);
 
 * s.search(6); // 1
 
 * s.search(5); // 2
 
 * s.search(4); // 3
 
 * s.search(27) // -1
 
 * 

* @param o the desired object.

* @return the 1-based position from the top of the stack where the object is located;

* the return value -1 indicates that the object is not on the stack.

*/

public int search(Object o) {

}

/**

* Returns true if this stack contains the specified element.

* More formally, returns true if and only if this stack contains

* at least one element e such that (o==null ? e==null : o.equals(e)).

* @param o element whose presence in this ArrayList is to be tested

* @return true if this ArrayList contains the specified element

*/

public boolean contains(Object o) {

}

/**

* Returns the index of the first occurrence of the specified element in this stack,

* or -1 if this ArrayList does not contain the element. This is the index in the

* underlying ArrayList, NOT the position in the stack as defined in the search

* function. More formally, returns the lowest index i such that (o==null ?

* get(i)==null : o.equals(get(i))), or -1 if there is no such index.

* @param o element to search for

* @return the index of the first occurrence of the specified element in this ArrayList,

* or -1 if this ArrayList does not contain the element

*/

public int indexOf(Object o) {

}

/**

* Returns the index of the last occurrence ;of the specified element in this stack,

* or -1 if this ArrayList does not contain the element. This is the index in the

* underlying ArrayList, NOT the position in the stack as defined in the search

* function. More formally, returns the highest index i such that (o==null ?

* get(i)==null : o.equals(get(i))), or -1 if there is no such index.

* @param o element to search for

* @return the index of the last occurrence of the specified element in this stack

*/

public int lastIndexOf(Object o){

}