javascript

js操作cookie方法

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//js获取cookie
/*获取Cookie值*/
function getCookie(c_name)
{
if(document.cookie.length>0){
   c_start=document.cookie.indexOf(c_name + “=”)
   if(c_start!=-1){
     c_start=c_start + c_name.length+1
     c_end=document.cookie.indexOf(“;”,c_start)
     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! *****************************************************************
//写cookies
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();
}
//读取cookies
function getCookie(name)
{
 var arr,reg=new RegExp(“(^| )”+name+”=([^;]*)(;|$)”);
 if(arr=document.cookie.match(reg))
  return unescape(arr[2]);
 else
  return null;
}
//删除cookies
function delCookie(name)
{
 var exp = new Date();
 exp.setTime(exp.getTime() – 1);
 var cval=getCookie(name);
 if(cval!=null)
  document.cookie= name + “=”+cval+”;expires=”+exp.toGMTString();
}
//使用示例
setCookie(“name”,”hayden”);
alert(getCookie(“name”));
//如果需要设定自定义过期时间
//那么把上面的setCookie　函数换成下面两个函数就ok;
//程序代码
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)
{
   alert(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;
   }
}
//这是有设定过期时间的使用示例：
//s20是代表20秒
//h是指小时，如12小时则是：h12
//d是天数，30天则：d30
setCookie(“name”,”aaron”,”s20″);

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