val
?? [v?l] ??? [v?l]
n. ??? ?? ??, 10N/M? ???
jquery val() ??? ???
??: val() ???? ??? ??? ?? ????? ?????. ??? ?? value ??? ?? ?????. ? ??? ?? ?? ??? ?????. ? ???? ????? ???? ??? ??? ??? ?? ?? ?????.
??: ??$(selector).val(value)
????:
| ???? | Description |
| value | ?? ?????. ??? ??? ? ???? ?????. |
?? ?: ? ??? ???? ??? ? ?? ?? ?????.
??: ??$(selector).val()
?? ? ??: $(selector).val(value)
????:
| Parameters | Description |
| value | Value ??? ?? ?????. |
??? ???? ? ?? ??: $(selector).val(function(index,oldvalue))
????:
| ???? | Description |
| function (?? , oldvalue) | ? ??? ?? ???? ??? ?????. |
| index | ????. ???? ??? ??? ?????. |
| oldvalue | ????. ???? ?? Value ??? ?????. |
jquery val() ??? ?
<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(){
$("button").click(function(){
$(":text").val("Hello Kitty");
});
});
</script>
</head>
<body>
<p>Name: <input type="text" name="user" value="Hello World" /></p>
<button>改變文本域的值</button>
</body>
</html>??? ????? ??? "???? ??" ??? ?????