What is wrong in this script?

I'm new to scripting and I have no idea what's wrong in this script. I'm trying to make a particle effect (a flamethrower) appear when I hit the second mb, or Fire2. I have a box collider around it to detect enemys and take damage.

The error says: /Scripts/FlameThrower.js(13,32): BCE0017: The best overload for the method 'UnityEngine.Input.GetMouseButton(int)' is not compatible with the argument list '(String)'.

Script:

 #pragma strict
 
 var FlameThrower : ParticleSystem;
 
 function Start ()
 {
     FlameThrower.emissionRate = 0.0f;
     GameObject.Find("FlameCollider").GetComponent(Collider).enabled = false;
 }
 
 function Update ()
 {
     if(Input.GetMouseButton("Fire2"))
     {
         FlameThrower.emissionRate = 150.0f;
         GameObject.Find("FlameCollider").GetComponent(Collider).enabled = true;
         
         
     }
     
     else 
     {
         FlameThrower.emissionRate = 0.0f;
         GameObject.Find("FlameCollider").GetComponent(Collider).enabled = false;
     }
 }