BRP_-_KC_CREATE_NEW_CASE.user.js

// ==UserScript==
// @name        BRP - KC CREATE NEW CASE
// @namespace   http://github.com/Tiny-Giant
// @description Makes a link to create new case on knowledge center VIN lookup page
// @include     https://brp.secure.force.com/apex/cs_main*
// @include     https://brp.secure.force.com/500/e?RecordType=012a0000001C8JP&VIN=*
// @version     1
// @grant       none
// ==/UserScript==

if (/cs_main/.test(window.location.href))
{
    var funcs = {};

    funcs.addXHRListener = function(callback)
    {
        var open = XMLHttpRequest.prototype.open;

        XMLHttpRequest.prototype.open = function()
        {
            this.addEventListener('load', callback.bind(null, this), false);
            open.apply(this, arguments);
        };
    };

    funcs.addXHRListener(function(XHR)
    {
        if (document.querySelector('.newcaselink') !== null)
        {
            return false;
        }

        var VIN = document.querySelector("#vinString").value.trim();

        if (!VIN)
        {
            return false;
        }

        if (XHR.responseURL !== "https://brp.secure.force.com/cs_main")
        {
            return false;
        }

        var headers = [].slice.call(document.querySelectorAll('.headingPanel'));

        if (headers.length === 0)
        {
            return false;
        }

        var linksHeader = (headers.filter(function(el){ 
            return /Links/.test(el.textContent);
        }) || [false])[0];

        if (linksHeader === false)
        {
            return false;
        }

        var links = linksHeader.parentNode;
        var newcase = links.children[2].cloneNode(true);
        newcase.id = '';
        var newcaselink = newcase.querySelector('a');
        newcaselink.removeAttribute("onclick");
        newcaselink.textContent = "Create New Case";
        newcaselink.className = "newcaselink";
        newcaselink.href = "https://brp.secure.force.com/500/e?RecordType=012a0000001C8JP&VIN=" + VIN;
        newcaselink.target = "_blank";
        links.insertBefore(newcase, links.children[2]);
    });
} 
else 
{
    document.querySelector('#Asset').value = window.location.search.split('&')[1].split('=')[1];
}