代码：【复制】 
<h3>系统将在<span id="lseconds" style="color:#ff0000">10</span>秒后自动跳转</h3>
<script type="text/javascript">
<!--
var secs = 10;
for(i=1;i<=secs;i++) {
	window.setTimeout('goURL('+i+')', i * 1000);
}

function goURL(num) {
	if(num == secs){
		top.location = '/index.php';
	}
	else {
		left_seconds = secs - num;
		document.getElementById("lseconds").innerHTML = left_seconds;
	}
}
//-->
</script>