复制代码 代码如下:

//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 setCookie2(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

//暂时只写了这三种

setCookie2("name2","hayden2","s20");

alert(getCookie("name2"));

以下是几个比较常见的好用的函数：

复制代码 代码如下:

function GetCookieVal(offset)

//获得Cookie解码后的值

{

var endstr = document.cookie.indexOf (";", offset);

if (endstr == -1)

endstr = document.cookie.length;

return unescape(document.cookie.substring(offset, endstr));

}

function SetCookie(name, value)

//设定Cookie值

{

var expdate = new Date();

var argv = SetCookie.arguments;

var argc = SetCookie.arguments.length;

var expires = (argc > 2) ? argv[2] : null;

var path = (argc > 3) ? argv[3] : null;

var domain = (argc > 4) ? argv[4] : null;

var secure = (argc > 5) ? argv[5] : false;

if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));

document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))

+((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))

+((secure == true) ? "; secure" : "");

}

function DelCookie(name)

//删除Cookie

{

var exp = new Date();

exp.setTime (exp.getTime() - 1);

var cval = GetCookie (name);

document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();

}

function GetCookie(name)

//获得Cookie的原始值

{

var arg = name + "=";

var alen = arg.length;

var clen = document.cookie.length;

var i = 0;

while (i < clen)

{

var j = i + alen;

if (document.cookie.substring(i, j) == arg)

return GetCookieVal (j);

i = document.cookie.indexOf(" ", i) + 1;

if (i == 0) break;

}

return null;

}

//测试

SetCookie("sunshine","1986");

alert(GetCookie("sunshine"));

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