//修改COOKIES，和读取cookies使用的JS文件
if(typeof(cookies)=="undefined")
{
	cookies={};
};
//读取COOKIES值 如果没找多对应的值将返回undefined
cookies.reader=function (variableName)
{
  var cookiearray = document.cookie.split("; ");
   for(var i = 0;i < cookiearray.length;i ++)
   {   
   	 var temp = cookiearray[i].split("="); 
   	   if(temp[0] == variableName) 
   	   return unescape(temp[1]);  
   	} 
}
//需要设置COOKIES时间
cookies.write=function(variableName,variableValue,time)
{
  
     document.cookie   =   variableName   +   "= "+   escape(variableValue)   + ";expires= "+   cookies.setSaveTime(time).toGMTString(); 
}
//默认设置COOKIES保存时间为30天
cookies.write=function(variableName,variableValue)
{
  
     document.cookie   =   variableName   +   "= "+   escape(variableValue)   + ";expires= "+   cookies.setSaveTime(30).toGMTString(); 
}
//保存为天数
cookies.setSaveTime=function(day)
{
     var   exp     =   new   Date();        
     exp.setTime(exp.getTime()   +   day*24*60*60*1000);  
     return exp;  
}