Animator problem start animation

Questions & Answers
1

Hello everyone!

When I press the left mouse button on a box collider should animate a second animation. when I press the button I get this cluster error:
Invalid Layer Index
UnityEngine.Animator: Play (String)
$: MoveNext () (at Assets / x ninja / Code / Upload blocking livello.js: 18)
UnityEngine.SendMouseEvents: DoSendMouseEvents (Int32, Int32)

What could be the problem?

script:

var levelToLoad : String;
var soundhover : AudioClip;
var beep : AudioClip;
var QuitButton : boolean = false;
var anim : Animator;

function Start()
{
   anim = GetComponent("Animator");
}

function OnMouseEnter(){
audio.PlayOneShot(soundhover);
}

function OnMouseDown(){

anim.Play ("Secondo");

audio.PlayOneShot(beep);

yield new WaitForSeconds(15);
if(QuitButton){
Application.Quit();
}
else{
Application.LoadLevel(levelToLoad);
}
}
@script RequireComponent(AudioSource)
2

You can’t use OnMouseDown() as Corutine

var levelToLoad : String;
var soundhover : AudioClip;
var beep : AudioClip;
var QuitButton : boolean = false;
var anim : Animator;

function Start()
{
    anim = GetComponent("Animator");
}

function OnMouseEnter(){
    audio.PlayOneShot(soundhover);
}

function OnMouseDown(){
    PlayAnim("Secondo");

}
function PlayAnim(animString : String)
{
    anim.Play (animString);
    audio.PlayOneShot(beep);
    yield new WaitForSeconds(15);
    if(QuitButton){
        Application.Quit();
    }
    else{
        Application.LoadLevel(levelToLoad);
    }
}
@script RequireComponent(AudioSource)