function replaceImage(img) {
	if (img.width == '1' && img.src.match(/\.01\./)) {
		img.src = 'http://images-jp.amazon.com/images/G/09/x-locale/detail/thumb-no-image.gif';
		img.width = 98;
		img.height = 140;
	} else if (img.width == '1') {
		img.src = img.src.replace('.09.','.01.');
	}
}

<script src="path/to/amazon.js" type="text/javascript"></script>

<img src="/path/to/image" onload="replaceImage(this)" />

function grep (pattern) {
	try {
		regex = new RegExp(pattern, "i");
		spans = document.getElementsByTagName('span');
		for (i = 0; i < spans.length; i++) {
			e = spans[i];
			if (e.className == "line" && e.innerHTML.match(regex)) {
				e.style.display = "inline";
			} else {
				e.style.display = "none";
			}
		}
	} catch (e) {
		// 正規表現の文法エラーを無視する
	}
}

<form>
<input type="text" name="pattern" onkeyup="grep(this.value)">
</form>

<form onsubmit="grep(this.pattern.value); return false;">
<input type="text" name="pattern">
</form>

highlightColor = "yellow";
backgroundColor = "white";

var cache;
function initCache () {
	cache = new Array();
	spans = document.getElementsByTagName('span');
	for (i = 0; i < spans.length; i++) {
		name = spans[i].className;
		if (!cache[name]) {
			cache[name] = new Array();
		}
		cache[name].push(spans[i]);
	}
}

function hlclass (name, flag) {
	if (!cache) {
		initCache();
	}
	for (i = 0; i < cache[name].length; i++) {
		cache[name][i].style.backgroundColor = (flag ? highlightColor : backgroundColor);
	}
	return true;
}

<span class="x" onmouseover="hlclass('x', 1)" onmouseout="hlclass('x', 0)">x</span>
<span class="x" onmouseover="hlclass('x', 1)" onmouseout="hlclass('x', 0)">x</span>
<span class="y" onmouseover="hlclass('y', 1)" onmouseout="hlclass('y', 0)">y</span>
<span class="y" onmouseover="hlclass('y', 1)" onmouseout="hlclass('y', 0)">y</span>