Ebay Buy It Now by Price

Greasy Fork is available in English.
Ebay Buy It Now by Price

Auto set Buy It Now, sort by price and Gallery view parameters on Ebay search
换行
// ==UserScript==
// @run-at document-start
// @name        Ebay Buy It Now by Price
// @namespace   EBINbP
// @description Auto set Buy It Now, sort by price and Gallery view parameters on Ebay search
// @version     1.1
// @copyright   2015 steve
// @include     http://www.ebay.tld/sch/*
// @include     https://www.ebay.tld/sch/*
// @grant       none
// ==/UserScript==

try {
    var url = document.location.toString();
    var updateUrl = url

//    console.log(url);   // original URI
    updateUrl = updateQueryStringParameter(updateUrl, 'LH_Auction', ''); // remove Auction
    updateUrl = updateQueryStringParameter(updateUrl, 'LH_BIN', '1');   // Buy it NOW parameter
    updateUrl = updateQueryStringParameter(updateUrl, '_sop', '15');   // Sort by price parameter
    updateUrl = updateQueryStringParameter(updateUrl, '_dmd', '2');   // Gallery view parameter
//    console.log(updateUrl);   // changed URI
//    console.log(url != updateUrl);   // true = URI has changed

    if (url != updateUrl) {
        document.location = updateUrl;
    }
} catch (e) {}

// set, change or remove parameter
function updateQueryStringParameter(uri, key, value) {
    // remove parameter if empty value
    var parameterSet = (key.length && value.length > 0 ? key + "=" + value : "");
    var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");
    var separator = uri.indexOf('?') !== -1 ? "&" : "?";
    if (uri.match(re)) {
        parameterSet = (parameterSet.length > 0 ? parameterSet +'$2' : "");
        return uri.replace(re, '$1' + parameterSet);
    } else {
        parameterSet = (parameterSet.length > 0 ? separator + parameterSet : "");
        return uri + parameterSet;
    }
}