How to make an array with key-value pairs as integers, and loop through each key value pair to pass as arguments to my function?

What I want to do is:

I have a function that animates a div's margin-left percentage, with an associated distance counter (for another function):

function animateValue(amount, counter) {
    myDivToAnimate.animate({
        marginLeft: amount + '%'
    }, 1200, function () {
        slideCounterValue = counter;
    });
}

And I'm calling it as follows, decimal places are required for this:

animateValue(-100.5, -1)

What I want to do is make an array or an object (I'm not sure which), that has the arguments from above. So for eg:

var myArray = [{-100.5: -1},{-200.8: -2},{-312.5: -3}...]

and then pass these to my animateValue() arguments.

I'm not sure how to either:

• Create the array with integers, which are negative and have decimals
• Pass these pairs from the array to my animateValue() arguments.

Finally, once I have these sorted I need to randomize the array key-value pairs that are pulled, so that each time it animates to a different margin-left and associated counter value.

It's probably a simple answer but I can't seem to get my head around it.