`

页面定时跳转

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	<body>
		<div id="message">
			会话已过期,请
			<a href="login.jsp" target="_top">重新登录</a>。
			(<label id="time"></label>)
		</div>
		<script language=Javascript>
			var redirectTime = 3;
			function timed(){
				if(redirectTime > 0){
					document.getElementById("time").innerHTML = ""+redirectTime;
					setTimeout('timed()', 1000);
				}else{
					window.parent.location.href = "login.jsp";
				}
				redirectTime--;
			}
			timed();
		</script>
	</body>


在javascritp中,有两个关于定时器的专用函数,它们是: 

1.倒计定时器:timename=setTimeout("function();",delaytime); 

2.循环定时器:timename=setInterval("function();",delaytime);
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