http://d.hatena.ne.jp/mallowlabs/20061130/1164904737

googledefine_popup.user.js

// ==UserScript==
// @name googledefine_popup.user.js
// @author mallowlabs
// @version 0.0.2
// @namespace http://mallowlabs.s206.xrea.com/
// @published 2006-12-01
// @modified 2006-12-07
// @description : Popup "Google Define" by word selection
// @include       http://*
//
// @license GPL
//  Copyright (C) 2005, hatena.
//  Released under the GPL license
//  http://www.gnu.org/copyleft/gpl.html
//
//  id:takef
//  HatenaDiaryKeywordPopupForOpera.user.js
//  http://userjs.seesaa.net/article/13853826.html
//
// ==/UserScript==

(function () {
	var xpos = 0;
	var ypos = 0;
	var scrollX = 0;
	var scrollY = 0;
	
	function createPopup() {
		var popup = document.createElement('div');
		with(popup.style) {
			visibility = 'hidden';
			fontSize = '10pt';
			fontFamily = 'sans-serif';
			textAlign = 'left';
			lineHeight = '110%';
			color = '#333333';
			paddingLeft = '5px';
			paddingRight = '5px';
			backgroundColor = 'cornsilk';
			border = '1px solid #333333';	
			position = 'absolute';
			left = (xpos + 10) + 'px' ;
			top = (ypos + 25) + 'px';
			width = '250px';
		}
		popup.id = 'gdpopup';
		return popup;
	}
	function hidePopup() {
		var popup = document.getElementById('gdpopup');
		document.body.removeChild(popup);
		document.removeEventListener("click", hidePopup, false);
	}
	function appendPopup(t) {
		var popup = document.getElementById('gdpopup');
		if (popup) {
			hidePopup();
		}
		var popupDiv = createPopup();
		popupDiv.innerHTML = t;
		
		popup = document.body.appendChild(popupDiv);
		
		var r = popup.offsetLeft + popup.offsetWidth;
		if (r > scrollX + document.body.clientWidth) {
			popup.style.left = (scrollX + document.body.clientWidth - popup.offsetWidth - 10) + 'px';
		}
		var b = popup.offsetTop + popup.offsetHeight;
		if (b > scrollY + document.body.clientHeight) {
			var t = scrollY + document.body.clientHeight - popup.offsetHeight - 10;
			if (t < scrollY)
				t = scrollY + 10;
			popup.style.top = t + 'px';
		}
		
		document.addEventListener('click',  hidePopup, false);

		popup.style.visibility = 'visible';
	}
	function showPopup(e, t) {
		setPos(e);
		
		GM_xmlhttpRequest({
			method:"GET",
			url:"http://www.google.co.jp/search?q=define%3A" + encodeURI(t),
			onload:function(details) {
				var res = details.responseText.match(/<li>.+?</i);
				res = res + "";
				if (res.indexOf("<")==-1) {
					res = "Not Found";
				} else {
					res = res.substring(4, res.length-1);
				}
				appendPopup(res);
		  }
		});
	}
	function setPos(e) {
		xpos = e.pageX;
		ypos = e.pageY;
		scrollX = e.pageX - e.clientX;
		scrollY = e.pageY - e.clientY;
	}
	function trim(argValue){
		return String(argValue).replace(/^ */gim, "").replace(/ *$/gim, "");
	}
	
	document.addEventListener('mouseup', function(e){
		var t = window.getSelection();
		t = t + "";
		if(t.match(/^ *[a-zA-Z]+ *$/)) {
			t = trim(t);
			showPopup(e, t);
		}
	}, false);
	
})();