Removing duplicates from an unsorted link list

dupLinkedlist.js

function removeDuplicates(SSL){
  if(this.head === null){
  	return false; 
  }else {
  	var current = this.head; 
  	var obj = {};
  	while(current.next !== null){
  		// going to use an object to check if
  		if(current.next.value in obj){
  			//we are going to do the swap 
  			current.next = current.next.next; 
  		}
  		// create a key with the value, rememeber there can not be duplicate keys
  		obj[current.value] = 1;
  		
  		//traverse down the link list 
  		current = current.next; 
  	}
  } 
  return SSL; 
}