focus

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vt . ??( ? ?? ??? ?? ??; ??(? ??); ??, ??; ??

n. ??; ???? ???; ??(??, ??, ?? ?); [??] ??, ??

jquery ???() ??? ???

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

??? ??? ??? ??: $(selector).focus()

??? ??? ??? ?? ???: $(selector).focus(function)

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Parameters
Description
function ?? ??. ??? ???? ??? ? ??? ??? ?????.?

jquery ???() ??? ?

<html>
<head>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("input").focus(function(){
    $("input").css("background-color","#FFFFCC");
  });
  $("input").blur(function(){
    $("input").css("background-color","#D6D6FF");
  });
});
</script>
</head>
<body>
Enter your name: <input type="text" />
<p>請(qǐng)?jiān)谏厦娴妮斎胗蛑悬c(diǎn)擊，使其獲得焦點(diǎn)，然后在輸入域外面點(diǎn)擊，使其失去焦點(diǎn)。</p>
</body>
</html>
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