获取Cookie函数：
function getCookie(cookieName) {var strCookie = document.cookie
var arrCookie = strCookie.split(" ")
for(var i = 0 i < arrCookie.length i++){
var arr = arrCookie[i].split("=")
if(cookieName == arr[0]){
return arr[1]
}
}
return ""
}
调用：
var user_id = getCookie("selected_prj_id")用js向cookie中保存数据、获取数据的方法如下：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
}
SetCookie("username1",99)
alert(GetCookie("username1"))
