JavaScript中Cookie缓存的实现

// Cookie管理
function CookieManage() {

 // 填充数据到Cookie
 this.setCookie = function(name, value, days) {
  var cycleTime = 30 * 60 * 1000;
  if (days)
   cycleTime = days * 24 * cycleTime;
  var exp = new Date();
  // 设置生命周期
  exp.setTime(exp.getTime() + cycleTime);
  document.cookie = name + "=" + escape(value) + ";expires="
    + exp.toGMTString();
 }

 // 获取Cookie中的数据
 this.getCookie = function(name) {
  var arr = document.cookie.match(new RegExp("(^| )" + name
    + "=([^;]*)(;|$)"));
  if (arr != null)
   return unescape(arr[2]);
  return null;
 }

 // 清除Cookie中的数据
 this.delCookie = function(name) {
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval = this.getCookie(name);
  if (cval != null)
   document.cookie = name + "=" + cval + ";expires="
     + exp.toGMTString();
 }

 // 清除所有Cookie
 this.clearCookies = function() {
  if (confirm('你确定要清空所有Cookie吗?')) {
   var temp = document.cookie.split(";");
   var ts;
   for ( var i = 0;; i++) {
    if (!temp[i])
     break;
    ts = temp[i].split("=")[0];
    delCookie(ts);
   }
  }
 }
}