NewBie Question, jQuery: How can we implement if...else logic and call function
<p>I am new to jQuery and so don't mind this question if it sounds stupid but here is something that I am trying to do :</p>

<p>I have 3 functions like:</p>

<pre><code>AddToCart Function which adds item to the shopping cart:
//offer_id is the offer which we are trying to add to cart. 
    addToCart: function(offer_id)
    {
    },


RemoveFromCart which removes data from the cart
//target is link clicked and event is the click event. 
    removeFromCart: function(target, event)
    {
    },

Get the current state of the cart   
//return string which represents current state of cart. 
    getCartItems: function()
    {
    }
</code></pre>

<p>Now I am trying to do 3 things:</p>

<ol>
<li>if there is no <code>content</code> in cart 
and <code>addToCart</code> is called than <code>some action</code>, so basically here we need to check the current state of cart and that is obtained by calling <code>getCartItems</code> and if it is <code>Null</code> and than if <code>addToCart</code> is called than we perform <code>some action</code></li>
<li>if there is <code>content</code> in the cart 
and <code>addToCart</code> is called than <code>some action</code>,so basically here we need to check the current state of cart and that is obtained by calling <code>getCartItems</code> and check if it is <code>Null</code> or not and than if <code>addToCart</code> is called than we perform <code>some action</code> if we had some content in the cart. </li>
<li>if there is <code>content</code> in the cart 
and <code>removeFromCart</code> is called <code>some action</code>, so basically here we need to check the current state of cart and that is obtained by calling <code>getCartItems</code> and if it is not Null and if <code>removeFromCart</code> is called than we perform <code>some action</code></li>
</ol>

<p>Pseudocode of what I am trying to do:   </p>

<pre><code>    if there is no content in cart 
        and addToCart is called than 
        $(document).track(
            );

    if there is content in the cart 
        and addToCart is called than
        $(document).track(
            );

    if there is content in the cart 
        and removeFromCart is called 
        $(document).track(
            );
</code></pre>

<p>My basic concern is that am complete newbie to jQuery and JavaScript and so am not sure how can I implement if...else logic and how can I call a funtion using jQuery/JavaScript. </p>
