怎样用js检测选中文字
选中了文字，然后按下“alt”按键，然后执行js 弹出该文字，js或jquery应该怎么写？
[解决办法]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<title>无标题文档</title>
</head>
<body>
<div id="content">this is demo:pktandy@apobates.com</div>
<script type="text/javascript">
jQuery(function($){
$('#content').mouseup(function(e){
var userSelection, text;
if (window.getSelection) {
userSelection = window.getSelection();
} else if (document.selection) {
userSelection = document.selection.createRange();
}
try {
text = userSelection.toString();
} catch (err) {
text = userSelection.text;
}
alert(text);
});
});
</script>
</body>
</html>
