Unexpected Token: ..

var quit=false;

function OnMouseEnter()
{

renderer.material.color = Color.red;

}

function OnMouseExit
(

renderer.material.color = Color.white;

}

function OnMouseUp()
{

if (quit == true)
{
	Application.Quit();
}
else
{
	Application.LoadLevel(2);
}	

}

function Update()

{
if (Input.GetKey(KeyCode.Escape))
{
Application.Quit();
}
}

it says in line 13, renderer.material.color = Color.white; , unexpected token:…

Read up on what brackets (, ) and braces {, } are for. Your OnMouseExit function is written badly.