如何用javascript读写cookeis？

[PCIBM]

IF 读取COOKIES.t ＝a then
window.open('http://www.google.com');
COOKIES.t ＝a
elseif 读取COOKIES.t ＝b then
window.open('http://www.csdn.net');
COOKIES.t ＝b
elseif 读取COOKIES.t ＝c then
window.open('http://www.163.com');
COOKIES.t ＝c
end if


每个cookeis的过期时间为从现在算起24小时


麻烦写完整一下，谢谢！

[bzscs]

function Cookie(document, name, hours, path, domain, secure)
{
// All the predefined properties of this object begin with '$'
// to distinguish them from other properties which are the values to
// be stored in the cookie.
this.$document = document;
this.$name = name;
if (hours)
this.$expiration = new Date((new Date()).getTime() + hours*3600000);
else this.$expiration = null;
if (path) this.$path = path; else this.$path = null;
if (domain) this.$domain = domain; else this.$domain = null;
if (secure) this.$secure = true; else this.$secure = false;
}

// This function is the store() method of the Cookie object.
Cookie.prototype.store = function () {
// First, loop through the properties of the Cookie object and
// put together the value of the cookie. Since cookies use the
// equals sign and semicolons as separators, we'll use colons
// and ampersands for the individual state variables we store
// within a single cookie value. Note that we escape the value
// of each state variable, in case it contains punctuation or other
// illegal characters.
var cookieval = "";
for(var prop in this) {
// Ignore properties with names that begin with '$' and also methods.
if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function'))
continue;
if (cookieval != "") cookieval += ',';
//alert(prop + '|' + escape(this[prop]));
cookieval += prop + '|' + escape(this[prop]);
}

// Now that we have the value of the cookie, put together the
// complete cookie string, which includes the name and the various
// attributes specified when the Cookie object was created.
var cookie = this.$name + '=' + cookieval;
if (this.$expiration)
cookie += '; expires=' + this.$expiration.toGMTString();
if (this.$path) cookie += '; path=' + this.$path;
if (this.$domain) cookie += '; domain=' + this.$domain;
if (this.$secure) cookie += '; secure';

// Now store the cookie by setting the magic Document.cookie property.
this.$document.cookie = cookie;
}

// This function is the load() method of the Cookie object.
Cookie.prototype.load = function() {
// First, get a list of all cookies that pertain to this document.
// We do this by reading the magic Document.cookie property.
var allcookies = this.$document.cookie;
if (allcookies == "") return false;

// Now extract just the named cookie from that list.
var start = allcookies.indexOf(this.$name + '=');
if (start == -1) return false; // Cookie not defined for this page.
start += this.$name.length + 1; // Skip name and equals sign.
var end = allcookies.indexOf(';', start);
if (end == -1) end = allcookies.length;
var cookieval = allcookies.substring(start, end);

// Now that we've extracted the value of the named cookie, we've
// got to break that value down into individual state variable
// names and values. The name/value pairs are separated from each
// other by ampersands, and the individual names and values are
// separated from each other by colons. We use the split method
// to parse everything.
var a = cookieval.split(','); // Break it into array of name/value pairs.
for(var i=0; i < a.length; i++) // Break each pair into an array.
a[i] = a[i].split('|');

// Now that we've parsed the cookie value, set all the names and values
// of the state variables in this Cookie object. Note that we unescape()
// the property value, because we called escape() when we stored it.
for(var i = 0; i < a.length; i++) {
this[a[i][0]] = unescape(a[i][1]);
}

// We're done, so return the success code.
return true;
}

// This function is the remove() method of the Cookie object.
Cookie.prototype.remove = function() {
var cookie;
cookie = this.$name + '=';
if (this.$path) cookie += '; path=' + this.$path;
if (this.$domain) cookie += '; domain=' + this.$domain;
cookie += '; expires=Fri, 02-Jan-1970 00:00:00 GMT';

this.$document.cookie = cookie;
}

[NewBody]

bzscs的这段程序是处理客户端Cookie比较完善的方案;
不过如果采用正则表达式效率可能会好些.