on
English [?n] US [ɑ:n]
prep.(??? ???) to;(??? ???) on...; ..
adv.(put, wear, connect) on, (continue) down
adj. ?? ??, ?? ???
英]
n. ?; ??? [???] ??; ?? ? vi. ?? ????down
US [da?n]adv. down; (?? ?? ??? ??? ???) down (?? ???) down (??? ???) ??)
n.??; ???? ???? vt. (? ??? ?) vi. down; drop; down; down 3?? ??: downs ?? ??: downed
?????? onmousedown ?? ???
??: ??? ??? ??? ? ?????.
??: ??onmousedown="SomeJavaScriptCode"
????: SomeJavaScriptCode ?????. ? ???? ??? ? ??? JavaScript? ?????.?
?????? onmousedown ?? ?
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<img src="http://img.php.cn/upload/article/000/005/656/5af270fd37755429.jpg" onmousedown="alert('You clicked the picture!')" />
<p>點擊圖片觸發(fā)事件</p>
</body>
</html>???? ?? ?
??? ????? ??? "???? ??" ??? ?????