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在某本书上看到的，就是用户写文章时，每隔一定的时候，自动把用户的文章用cookie保存起来，也不失为一个办法，可以参考下．
update.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script type="text/javascript" src="js/ajax.js"></script>
<script type="text/javascript">
var ajax=new AJAXRequest();
function temp() {
var obj=document.getElementById("aj").value;
if(obj){
ajax.postf(
"p",
function(obj) {},
"update.php",
"POST" );
}else{
var obj2=getCookie("content");
alert(obj2);
document.getElementById("aj").value=obj2;
}
}
setInterval("temp();",3000);
function setCookie(name,value)
{
var Days = 3;
var exp = new Date();
exp.setTime(exp.getTime() + Days*60*60*1000);
document.cookie = name + "="+ encodeURIComponent(value)+";expires="+ exp.toGMTString();
}
function getCookie(name)
{
var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
if(arr != null) return decodeURIComponent(arr[2]);
return
null;
}
function delCookie(name)
{
var exp = new Date();
exp.setTime(exp.getTime() - 1);
var cval=getCookie(name);
if(cval!=null) document.cookie=name+"="+cval+";expires="+exp.toGMTString();
}
</script>
</head>
<body>
<form action="update.php" method="post" id="p">
<p>
<textarea name="content" cols="50" rows="10" id="aj"></textarea>
</p>
<p>
<input type="hidden" name="action" value="save" />
<input name="" type="submit" value="提交信息" style="margin-top:20px;width:250px;height:40px;"/>
</p>
</form>
</body>
</html>
update.php <?php header("content-Type: text/html; charset=UTF-8"); if($_POST['action'] == 'save') { $content = $_POST['content']; // 暂时把提交的数据保存到COOKIE $cookietime=time()+7200; setcookie('content',$content,$cookietime); echo $content; }?> （编辑：李大同）
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