用js这样的cookies怎么操作？

[thyong]

用js实现如vbs中 response.cookies("user")("cityid")=101000
和request.cookies("user")("cityid")

在页面顶部 我先判断是否有cookies存在，有则不变，没有则用vbs写入cookies，代码如下
cityid=request.cookies("user")("cityid")
if cityid="" or cityid then
cityid=110000
cityname="杭州"
response.cookies("user")("cityid")=cityid
response.cookies("user")("cityname")=cityname
response.cookies("user").domain=".user.com."
Response.Cookies("user").Secure = False
end if

在前台页面上放了个下拉框，切换下拉框时触发js写cookies值，实现功能如以上代码。
然后再用asp取出cityid

谢谢

[tantaiyizu]

document.cookie

[lap1983]

function setCookie(name, value)//cookies设置
{

var argv = setCookie.arguments;//获取参数数组
var argc = setCookie.arguments.length;//
var expires = (argc > 2) ? argv[2] : null;//是否设置cookies日期
if(expires!=null)
{
var LargeExpDate = new Date ();
LargeExpDate.setTime(LargeExpDate.getTime() + (expires*1000*3600*24));
}

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

}

function getCookie(Name)//cookies读取
{
var search = Name + "="
if(document.cookie.length > 0)
{

offset = document.cookie.indexOf(search)
if(offset != -1)
{
offset += search.length
end = document.cookie.indexOf(";", offset)
if(end == -1) end = document.cookie.length
return unescape(document.cookie.substring(offset, end))
}
else return ""
}
return ""
}