// ==UserScript==
// @name          Amazon Narashino City Lib linky
// @namespace     l-v-l.org
// @description    Lookup from Amazon book listings.
// @include       http://*.amazon.*
// ==/UserScript==

libsearch();

function libsearch() {
	// mainmatch = window._content.location.href.match(/\/(\d{9}[\d|X])\//);
	var href = document.location.href;
	var index_1 = href.indexOf('product');
	var index_2 = href.indexOf('dp');
	var index_3 = href.indexOf('ASIN');
	var asin = "";
	if (index_1 > 0) {
		var asin = href.substring(index_1 + 8,index_1 + 18);
	} else if (index_2 > 0) {
		var asin = href.substring(index_2 + 3,index_2 + 13);
	} else if (index_3 > 0) {
		var asin = href.substring(index_3 + 5,index_3 + 15);
	}
	if (asin.match(/(\d{9}[\d|X])/)){
		var header = document.evaluate("//div[@id='priceBlock']", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
		if (header) {
			var spl_link = document.createElement('a');
			spl_link.setAttribute('href', 'https://www.narashino-lib.jp/toslist.asp?tilandor=1&tilkey1=&tilkey2=&tilkey3=&autandor=1&autkey1=&autcod1=&autkey2=&autcod2=&autkey3=&autcod3=&autpos=1&pubkey1=&pubcod1=&kenkey1=&kencod1=&bunkey1=&isbnkey1=' + asin + '&syuyyy1=&syummm1=&syuyyy2=&syummm2=&lcskbn=20&lcskbn=30&lcskbn=40&lcskbn=50&lcskbn=60&lcskbn=42&dspcnt=10&sort=1&order=1&x=71&y=17&pg=0&style=10&seq=');
			spl_link.setAttribute('title', 'To Narashinoshi Library');
			spl_link.innerHTML = '</br><span style=\"font-size:90%; background-color:#ffffcc;\">&raquo; &#x7FD2;&#x5FD7;&#x91CE;&#x5e02;&#x56f3;&#x66f8;&#x9928;</span>';
			header.parentNode.insertBefore(spl_link, header.nextSibling);
		}
	}
}