i am unable to understand this code.can anyone explain this to me?

please see this code

var sse2 = function()
{
    var var1;
    var var2;
    return
    {
        buildmenu:function()
        {
        }
        move:function()
        {
        }
    }     
}

This code is for horizontal menu.In this code i am unable to understand the following two things

(1) can we define an object as shown below
var sse2 = function()
{
}
(2) what is doing with this following stament
return
{
    buildmenu:function()
    {
    }
    move:function()
    {
    }
}

can anyone explain this code