on

English [?n] US [ɑ:n]

prep.(??? ???) to;(??? ???) on...; ..

adv.(put, wear, connect) on, (continue) down

adj. ?? ??, ?? ???

英]

n. ?; ??? [???] ??; ?? ?

vi. ?? ????

over

r)] US[?o?v?(r)]

prep.(????? ?? ??? ??) on...

adv? ?? .end; ???? ?????

n.extra; ???(?? ??) ??;

int.[??] ???? ???????.

vt. ????, ????; [?? ???] ????

??: ??

?????? onmouseover ?? ???

??: ??? ???? ??? ??? ??? ? ?????.

??: ??onmouseover="SomeJavaScriptCode"

????: SomeJavaScriptCode ?????. ? ???? ??? ? ??? JavaScript? ?????.?

?????? onmouseover ?? ?

<html>
<head>
    <meta charset="UTF-8">

</head>
<body>

<img src="http://img.php.cn/upload/article/000/005/656/5af270fd37755429.jpg" onmouseover="alert('鼠標在這張圖片上!')" />
<p>移動鼠標至圖片觸發(fā)事件</p>
</body>
</html>

???? ?? ?

??? ????? ??? "???? ??" ??? ?????