<html> 
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<title>test</title>
	</head>
<body>
<h1><font color=blue> 示范网页 </font> </h1>
<p></br>
<script>

	setTimeout("alert('对不起，久等了');", 3000);
	setTimeout("alert('对不起');",3000);
function clearWord()
{
	document.title = '';
}
</script>

<form>
<input type="button" value="在状态列显示文字" onClick="document.title='Hello' ,setTimeout('clearWord()', 3000) " />
</form>
</body> 
</html>

在这里插入图片描述

<html> 
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script>
x = 0
function countSecond( )
{　x = x+1
　 document.fm.displayBox.value=x
　 setTimeout("countSecond()", 1000)
}
</script> </head>
<body bgcolor=lightcyan text=red> <p> </br>

<form name=fm>
<input type="text" name="displayBox"value="0" size=4 >
</form>

<script>
countSecond()
</script>
</body> 
</html>

在这里插入图片描述

<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<title></title>
	</head>
	<body onload="countSecond();">
		<script>
			var x = 0;
			function countSecond()
			{　if ( x < 20 ) {　
					x = x + 1;
		　　　　	document.getElementById("displaySec").value = x
			　　	setTimeout("countSecond()", 1000)
			　　}
			}
		</script>
		<input type="text" id="displaySec" value="0" />
	</body>
</html>

运行结果