cookie 删除，设置，修改

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>

<body>
<script language="JavaScript" type="text/javascript">
<!--
function addCookie(name,value,expireHours){
var cookieString=name+"="+escape(value);
//判断是否设置过期时间
if(expireHours>0){
  var date=new Date();
  date.setTime(date.getTime+expireHours*3600*1000);
  cookieString=cookieString+"; expire="+date.toGMTString();
}
document.cookie=cookieString;
}
function getCookie(name){
var strCookie=document.cookie;
var arrCookie=strCookie.split("; ");
for(var i=0;i<arrCookie.length;i++){
  var arr=arrCookie[i].split("=");
  if(arr[0]==name)return arr[1];
}
return "";
}
function deleteCookie(name){
var date=new Date();
date.setTime(date.getTime()-10000);
document.cookie=name+"=v; expire="+date.toGMTString();
}

//-->
</script>
</body>
</html>

补充：网页制作,js教程