JavaScript DHTML/jQuery/Event Key — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Текущая версия на 07:24, 26 мая 2010
Содержание
Check key code
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
if (e.which > 65 ) {
alert(e.which);
}
});
});
</script>
</head>
<body>
<body>
<input type="text" />
</body>
</html>
Convert key code to char
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>")).children(":last").append(document.createTextNode(c));
$("div").text(e.which);
});
});
</script>
</head>
<body>
<body>
<input type="text" />
<p>Add text - </p>
<div></div>
</body>
</html>
Document key down event
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(window).keydown(function(event){
alert(event.keyCode);
switch (event.keyCode) {
}
});
});
</script>
</head>
<body>
<body>
<p><input type="text" /> <span>focus event fire</span></p>
</body>
</html>
Get key code
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>")).children(":last").append(document.createTextNode(c));
$("div").text(e.which);
});
});
</script>
</head>
<body>
<body>
<input type="text" />
<p>Add text - </p>
<div></div>
</body>
</html>
Key pressed event
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>")).children(":last").append(document.createTextNode(c));
$("div").text(e.which);
});
});
</script>
</head>
<body>
<body>
<input type="text" />
<p>Add text - </p>
<div></div>
</body>
</html>
Key up event and check the key code
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keyup(function (e) {
if (e.which > 65 ) {
alert(e.which);
}
});
});
</script>
</head>
<body>
<body>
<input type="text" />
</body>
</html>
Key up event and get the typed value
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keyup(function () {
var value = $(this).val();
$("div").text(value);
}).keyup();
});
</script>
</head>
<body>
<body>
<input type="text" value="some text"/>
<div></div>
</body>
</html>
To perform an action when the escape key has been released:
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).keyup(function(event){
if (event.keyCode == 27) {
alert("escaped!");
}
});
});
</script>
<style>
div.dbl { background:yellow;color:black; }
</style>
</head>
<body>
<body>
<p><input type="text" /> <span>focus fire</span></p>
<p><input type="password" /> <span>focus fire</span></p>
</body>
</html>