Click Sound

I have a script that plays a sound on mouse click. But I have a problem here, it says:

“No appropriate version of ‘UnityEngine.AudioSource.Play’ for the argument list ‘(String)’ was found.”

Here’s the script :

function OnMouseDown ()
{
   if(Input.GetMouseButtonDown(0));
   audio.Play("Click");
}

var AudioClip click;

audio.PlayOneShot(click);