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function getCookie(c_name)
   c_start=document.cookie.indexOf(c_name + “=”)
     c_start=c_start + c_name.length+1
     if(c_end==-1) c_end=document.cookie.length
     return unescape(document.cookie.substring(c_start,c_end))
return “”
**********************************//JS操作cookies方法! *****************************************************************
function setCookie(name,value)
 var Days = 30;
 var exp = new Date();
 exp.setTime(exp.getTime() + Days*24*60*60*1000);
 document.cookie = name + “=”+ escape (value) + “;expires=” + exp.toGMTString();
function getCookie(name)
 var arr,reg=new RegExp(“(^| )”+name+”=([^;]*)(;|$)”);
  return unescape(arr[2]);
  return null;
function delCookie(name)
 var exp = new Date();
 exp.setTime(exp.getTime() – 1);
 var cval=getCookie(name);
  document.cookie= name + “=”+cval+”;expires=”+exp.toGMTString();
//那么把上面的setCookie 函数换成下面两个函数就ok;
function setCookie(name,value,time)
 var strsec = getsec(time);
 var exp = new Date();
 exp.setTime(exp.getTime() + strsec*1);
 document.cookie = name + “=”+ escape (value) + “;expires=” + exp.toGMTString();
function getsec(str)
   var str1=str.substring(1,str.length)*1;
   var str2=str.substring(0,1);
   if (str2==”s”)
     return str1*1000;
   else if (str2==”h”)
    return str1*60*60*1000;
   else if (str2==”d”)
    return str1*24*60*60*1000;


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