function Queue()
{
var items = new Array();
var first = 0;
var count = 0;
this.Count = function()
{
return count
};

this.Peek = function(last)
{
var result = null;
if(count > 0)
{
if(null != last && true == last)
{
result = items[first + (count - 1)]
}
else
{
result = items[first]
}
}

return result
};

this.Enqueue = function(x)
{
items[first + count] = x;
count++;
return x
};

this.Dequeue = function()
{
var result = null;
if(count > 0)
{
result = items[first];
delete items[first];
first++;
count–
}

return result
}
}