平时网站的开发中cookie用的还是用的比较多的，因为cookie在客户端，所以用js操作的比较多，下面是常用的设置、查找、删除等功能实现。
function addCookie(objName, objValue, objHours){//添加cookie
var str = objName + "=" + escape(objValue);
if (objHours > 0) {//为0时不设定过期时间，浏览器关闭时cookie自动消失
var date = new Date();
var ms = objHours * 3600 * 1000;
date.setTime(date.getTime() + ms);
str += "; expires=" + date.toGMTString();
}
document.cookie = str;
alert("添加cookie成功");
} function getCookie(objName){//获取指定名称的cookie的值
var arrStr = document.cookie.split("; ");
for (var i = 0; i < arrStr.length; i++) {
var temp = arrStr[i].split("=");
if (temp[0] == objName)
return unescape(temp[1]);
}
} function delCookie(name){//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间
var date = new Date();
date.setTime(date.getTime() - 10000);
document.cookie = name + "=a; expires=" + date.toGMTString();
} function allCookie(){//读取所有保存的cookie字符串
var str = document.cookie;
if (str == "") {
str = "没有保存任何cookie";
}
alert(str);
}
这是在网上找到的一个例子，感觉挺好的就贴上来了 <html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head><script language="JavaScript" type="text/javascript">function addCookie(objName, objValue, objHours){//添加cookievar str = objName + "=" + escape(objValue);if (objHours > 0) {//为0时不设定过期时间，浏览器关闭时cookie自动消失var date = new Date();var ms = objHours * 3600 * 1000;date.setTime(date.getTime() + ms);str += "; expires=" + date.toGMTString();}document.cookie = str;alert("添加cookie成功");}function getCookie(objName){//获取指定名称的cookie的值var arrStr = document.cookie.split("; ");for (var i = 0; i < arrStr.length; i++) {var temp = arrStr[i].split("=");if (temp[0] == objName)return unescape(temp[1]);}}function delCookie(name){//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间var date = new Date();date.setTime(date.getTime() - 10000);document.cookie = name + "=a; expires=" + date.toGMTString();}function allCookie(){//读取所有保存的cookie字符串var str = document.cookie;if (str == "") {str = "没有保存任何cookie";}alert(str);}function $(m, n){return document.forms[m].elements[n].value;}function add_(){var cookie_name = $("myform", "cookie_name");var cookie_value = $("myform", "cookie_value");var cookie_expireHours = $("myform", "cookie_expiresHours");addCookie(cookie_name, cookie_value, cookie_expireHours);}function get_(){var cookie_name = $("myform", "cookie_name");var cookie_value = getCookie(cookie_name);alert(cookie_value);}function del_(){var cookie_name = $("myform", "cookie_name");delCookie(cookie_name);alert("删除成功");}</script>
</head>
<body>
<form name="myform"><div><label for="cookie_name">名称</label><input type="text" name="cookie_name" /></div><div><label for="cookie_value">值</lable><input type="text" name="cookie_value" /></div><div><label for="cookie_expireHours">多少个小时过期</lable><input type="text" name="cookie_expiresHours" /></div><div><input type="button" value="添加该cookie" οnclick="add_()"/><input type="button" value="读取所有cookie" οnclick="allCookie()"/><input type="button" value="读取该名称cookie" οnclick="get_()"/><input type="button" value="删除该名称cookie" οnclick="del_()"/></div>
</form>
</body>
</html>
