手机制作各种证件:如何在博客中实现网页跳转

这个最好在服务器端进行处理，用javascript判断，用户可以通过修改自己电脑的时间，或者破坏脚本来强行访问

贴段js的时间代码，我自己站上用的http://www.euyou.com

<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td> </td>
<td class="time"><script language=JavaScript> var version = 1.0;</script>
<script language=JavaScript1.1> var version = 1.1;</script>
<script language=JavaScript1.2> var version = 1.2;</script>
<script language=JavaScript1.3> var version = 1.3;</script>
<script language="JavaScript">
<!--
var y=new Date();
var gy=y.getYear();
var dName=new Array("星期天","星期一","星期二","星期三","星期四","星期五","星期六");
var mName=new Array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月");
if (version < 1.3)
{
if (gy<2000)
{
document.write(dName[y.getDay()] +"  19"+ y.getYear()+"年" + mName[y.getMonth()] + y.getDate() + "日");
}
else
document.write(dName[y.getDay()] +"  "+ y.getYear()+"年" + mName[y.getMonth()] + y.getDate() + "日");
}
else
{
document.write(dName[y.getDay()] +"  "+ y.getFullYear() +"年"+ mName[y.getMonth()] + y.getDate() + "日");
}
//-->
</script>
 </td>
<td class="time" id="time_text"><script language="JavaScript">
var timerID = null;
var timerRunning = false;

function stopclock (){
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds();
var timeValue = "" + hours;
timeValue += ((minutes < 10) ? ":0" : ":") + minutes;
timeValue += ((seconds < 10) ? ":0" : ":") + seconds;
document.all.time_text.innerHTML=timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}
stopclock();
showtime();
</script></td>
<td> </td>
</tr>
</table>