How would you get the value of assocIMG by key matching the key eg

if I have a var 11786 I want it to return media/catalog/product/8795139_633.jpg

var spConfig = {
    "attributes": {
        "125": {
            "id": "125",
            "code": "pos_colours",
            "label": "Colour",
            "options": [{
                "id": "236",
                "label": "Dazzling Blue",
                "price": "0",
                "oldPrice": "0",
                "products": ["11148"]
            }, {
                "id": "305",
                "label": "Vintage Brown",
                "price": "0",
                "oldPrice": "0",
                "products": ["11786", "11787", "11788", "11789", "11790", "11791", "11792", "11793"]
            }]
        }

    }
};
var assocIMG = // Added  - Removed { here, causes issues with other scripts when not working with a configurable product.
    {
        11786: 'media/catalog/product/8795139_633.jpg',
        11787: 'media/catalog/product/8795139_633.jpg',
    }

Above is the objects I am working with and below is my current jQuery. Help would be greatly appreciated.

$('#attribute125').change(function() {
    var image = $(this).val();

    $.each(spConfig.attributes, function() {

        prods = $(this.options).filter( function() { return this.id == image; } )[0].products[0];

    alert(prods);

    });

});
javascript jquery
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