获取Cookie
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 ""
}
设置Cookie
function setCookie(c_name,value,expiredays)
{
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+"="+escape(value)+ ((expiredays==null)?"": ;expires="+exdate.toGMTString())
}
测试Cookie
function checkCookie()
{
username=getCookie('username')
if (username!=null && username!="") {
alert('Welcome again '+username+'!')
}
else {
username=prompt('Please enter your name:',"")
if (username!=null && username!="") {
setCookie('username',username,)
}
}
}