// ==UserScript==
// @name         Jiku-Chu direct link
// @namespace    https://myconan.net
// @version      1.0
// @description  Make proper link on Jiku-Chu pages
// @author       nanaya
// @match        http://www.jiku-chu.com/products/list.php?*
// @grant        none
// ==/UserScript==

$(".title a").each(function() {
  var
    $el = $(this),
    productId = $el.attr("onclick").replace(/.*product_id=(\d+).*/, "$1"),
    url = "/products/detail.php?product_id=" + productId
  $el.attr("href", url)
  $el.attr("onclick", "")
})