chara-ani_direct_link.user.js

// ==UserScript==
// @name           chara-ani.com direct link
// @namespace      http://github.com/kga/userscripts
// @include        http://www.chara-ani.com/*
// ==/UserScript==

var host     = location.host,
    pathname = location.pathname,
    href     = location.href;
if ( pathname.lastIndexOf('/') >= 0 ){ pathname = pathname.substring(0, pathname.lastIndexOf('/') + 1) }

var dispatch = {
    details: function (param) {
        return 'http://' + host + pathname + 'details.aspx?prdid=' + param;
    },
    cart_in: function (param) {
        return 'http://' + host + pathname + 'cart_in.aspx?in=' + param + '&src=' + escape(href);
    },
    activitydelete: function () {
    }
};

Array.forEach(
    document.querySelectorAll('a[href^="javascript:onClick="]'),
    function (a) {
        var matched = a.href.match(/javascript:onClick=([a-zA-Z_]+)\((?:\'([a-zA-Z0-9]*)\')?\)/);

        if (matched) {
            var [_, func, arg] = matched;

            if (func == 'activitydelete') { return }

            a.href = dispatch[func](arg);
        }
    }
);