屏幕取词:
a. 代码:

<p>这是一段简单的段落文本</p><script>function getWord(){ var word = window.getSelection? window.getSelection(): document.selection.createRange().text alert( word )}document.body.addEventListener("click", getWord, false)</script>

b. 效果:

移除取词:
a. 代码:

<p>这是一段简单的段落文本</p><script>function removeWord(){ window.getSelection? window.getSelection().removeAllRanges(): document.selection.empty()}document.body.addEventListener("click", removeWord, false)</script>

b. 效果: