You would want to use a while() loop since we don't know the exact number of parents we have

jsFiddle Demo

function getParents(el, parentSelector /* optional */) {



    // If no parentSelector defined will bubble up all the way to *document*

    if (parentSelector === undefined) {

        parentSelector = document;

    }



    var parents = [];

    var p = el.parentNode;

    

    while (p !== parentSelector) {

        var o = p;

        parents.push(o);

        p = o.parentNode;

    }

    parents.push(parentSelector); // Push that parentSelector you wanted to stop at

    

    return parents;

}

Useage: Returns an Array of "parents"

// 2nd param optional, bubbles up to document

getParents( document.getElementById('me') ); 



// get all parents starting from -me- up to ID -outerParent-

getParents( document.getElementById('me'), document.getElementById('outerParent') );