JavaScript实例

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>饭桶教程(kuaikuaixuan.com)</title> 
<script>
var c=0;
var t;
var timer_is_on=0;
function timedCount(){
document.getElementById('txt').value=c;
c=c+1;
t=setTimeout("timedCount()",1000);
}
function doTimer(){
if (!timer_is_on)
{
timer_is_on=1;
timedCount();
}
}
</script> 
</head>
<body>
<form>
<input type="button" value="开始计数!" onClick="doTimer()">
<input type="text" id="txt">
</form>
<p>单击按钮，输入框将从0开始一直计数。</p>
</body>
</html>



© 2025 Copyright: kuaikuaixuan.com 京ICP备14015652号-3 网址导航