Starting animation with collision

Im having trouble making this code work. Im no genius or experienced programmer in unity. Its based on this answer code http://answers.unity3d.com/questions/14361/open-and-close-a-door-with-a-keypress.html

All i want to do is when the player collides with the trigger, it start the animation on the Slider.

 using UnityEngine;
 using System.Collections;
     
 public class Door : MonoBehaviour {
     bool doorIsOpen = false;
     GameObject currentDoor;
     
 void DoDoor(bool openCheck, string SlideUp, GameObject thisDoor);
 
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
         //If the trigger collides with our Player
     if (collider.gameObject.name == "Player") {
             
             //Creating a RaycastHit Variable called hit
             RaycastHit hit; 
             
             //Throws the raycast 10 Unity Metres forward
             if(Physics.Raycast (transform.position, transform.forward, hit, 10)){
                 
                 //if the raycast collides with a gameobject called Slider1 and if the trigger is not trigged
                 if(hit.collider.gameObject.tag == "SliderUp" && doorIsOpen == false){
                     
                     //store the gameobject of the collider hit
                     currentDoor = hit.collider.gameObject;
                     
                     //call the Door() function with parameters for:
                     //DoorIsOpen, animation, currentDoor Gameobject
                     Door(true, "SlideUp", currentDoor);
                 }
                 }    
         }
         
 }
 
 
     //Start the slider function    
     void DoDoor(bool openCheck, string SlideUp, GameObject thisDoor){
             
             //Sets the DoorIsOpen variable to true or false
             doorIsOpen = openCheck;
             
             //Plays the animation clip SlipUp
             thisDoor.animation.Play("SlideUp");
 }