JS獲取點擊標籤對象：
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
</head>
<body>
<div id="demo" οnclick="demo(this,'a');">123</div>
</body>
</html>
<script>
function demo(obj,b)
{
alert(obj.id);
alert(b)
}
</script>
