/*
** <summary>
** Cookie处理
** </summary>
** <param name="name">cookie键名</param>
** <param name="value">cookie键值</param>
** <param name="option">可选参数</param>
*/
var cookie = {
 /*设置cookie*/
 setCookie:function(name, value, option){ 
  var str = name +"="+ escape(value); 
  if(option){ 
   if(option.expireHours){ 
    var d = new Date(); 
    d.setTime(d.getTime()+option.expireHours*3600*1000); 
    str += "; expires="+d.toGMTString(); 
   } 
   if(option.path) str += "; path="+option.path; 
   if(option.domain) str += "; domain="+option.domain; 
   if(option.secure) str += "; true"; 
  }
  document.cookie = str; 
 } ,
 
 /*获取cookie*/
 getCookie:function(name){ 
  var arr = document.cookie.split("; "); 
  if(arr.length == 0) return ""; 
  for(var i=0; i <arr.length; i++)
  { 
   tmp = arr[i].split("="); 
   if(tmp[0] == name)
   {
    return unescape(tmp[1]); 
   }
  } 
  return "";
 } ,
 
 /*删除cookie*/
 delCookie:function(name){ 
  this.setCookie(name,"",{expireHours:-1});
 } ,
 
 /*获取cookie长度*/
 getLength:function(){
  return document.cookie.split("; ").length;
 }
};