StyleSet property ERROR: Cannot set property 'webkitTransition' of undefined-Collection of common programming errors

I am attempting to use the style.setProperty to create a sliding effect in Javascript.

Here is my code:

imageArray = [
    '',
    '',
    '',
];

var slideWidth = 300;
var slideHeight = 420;

var currentTranslation = -slideWidth;

function init() {
    imageArray.style.webkitTransition = '-webkit-transform 1200ms';
    getArray();
}

function getArray() {
    for (var i = 0; i < imageArray.length; i++) {
    $('.inner-image').append(imageArray);
    /*not sure if this is relevant  
    imageArray.src = ary[i].media.m;*/
    }
}

I’m new to programming so please forgive syntax errors or inconsistencies in logic. Thanks for your help.

Originally posted 2013-11-09 22:47:40.