melee script help

i am new to unity and trying to do melee script and got 5 errors please help here is my script

#pragma strict

var dammage : int = 75;
var distance : float;

function Update ()
{
   if (Input.GetButtonDown("Fire1"))
   {
      var hit : RaycastHit;
      if (Physics.Raycast (transform.position, transform.forward, hit))
      {
          distance = hit.distance;
          hit.transform.sendMessage("ApplyDammage"), dammage, SendMessageOptions.DontRequireReceiver);
        {
    {
{

When you end a function call that started with an open bracket { you need to close it with the closed bracket }. In your code you use open brackets again.

Replace the character on each of the last three lines with }

(Not guaranteed to fix everything, but will at least fix the majority of your problems)