Question

As it stands there us a difference between the two and I want them to run at the same time. Here is the code:

$(selector1).animate({
    height: '670'
}, 2000, function() {
    // Animation complete.  
});

$(selector2).animate({
    top: '670'
}, 2000, function() {
    // Animation complete.
});​

Answer 1

Using queue:false. You can see the full docshere.

$(selector1).animate({
    height: '670'
}, {
    duration: 2000,
    queue: false,
    complete: function() { /* Animation complete */ }
});

$(selector2).animate({
    top: '670'
}, {
    duration: 2000,
    queue: false,
    complete: function() { /* Animation complete */ }
});

Docs:

.animate( properties, options ) version added: 1.0

---

properties A map of CSS properties that the animation will move toward.
options A map of additional options to pass to the method. Supported keys:
duration: A string or number determining how long the animation will run.
easing: A string indicating which easing function to use for the transition.
complete: A function to call once the animation is complete.
step: A function to be called after each step of the animation.
queue: A Boolean indicating whether to place the animation in the effects queue. If false, the animation will begin immediately. As of jQuery 1.7, the queue option can also accept a string, in which case the animation is added to the queue represented by that string.
specialEasing: A map of one or more of the CSS properties defined by the properties argument and their corresponding easing functions (added 1.4).