It is not possible to invoke an expression of type 'UnityEngine.Rect'.

This is my script, it says

“Assets/Scripts/RespawnMenu.js(23,28): BCE0077: It is not possible to invoke an expression of type ‘UnityEngine.Rect’.”

#pragma strict

var LookAround01 : MouseLook;
var LookAround02 : MouseLook;
var charMotor : CharacterMotor;
var sprintScript : SprintAndCrouch;

function Start () 
{
	LookAround01 = gameObject.GetComponent(MouseLook);
	LookAround01 = GameObject.Find("MainCamera").GetComponent(MouseLook);
	charMotor = gameObject.GetComponent(CharacterMotor);
	sprintScript = gameObject.GetComponent(SprintAndCrouch);
}

function Update () 
{

}

function OnGUI ()
{
	if (GUI.Button)Rect(Screen.width*0.5-50, 200-20, 100, 40)("Respwan");
	{
	//RespawnPlayer();
	}
}

Please Help!

Line 24 should read

if (GUI.Button(Rect(Screen.width*0.5-50, 200-20, 100, 40),"Respwan")){
    // Do something
}

Check out the docs for an example here