JavaScript 對cookie 的增、刪、獲取

/*


設置cookie 名稱,值,過期時間(0 為刪除cookie),域名,路徑,安全 ,過期時間以天為單位
*/
function setCookie(name,value,exp,path,domain,secure)
{

var expDays = exp2460601000;
var expDate = new Date();
expDate.setTime(expDate.getTime()+expDays);
var expString = ((exp == null) ? “” : (“;expires=”+expDate.toGMTString()))
var pathString = ((path == null) ? “/” : (“;path=”+path))
var domainString = ((domain == null) ? “” : (“;domain=”+domain))
var secureString = ((secure == true) ? “;secure” : “” )
if(domain == ” || typeof(domain)==’undefined’) domain = ‘818.cn’;
return document.cookie = name + “=” + escape(value) + expString + pathString + domainString + secureString;
}</pre> 
  
/*


獲得cookie id
*/
function getCookie(name)
{
var result = null;
var myCookie = document.cookie + “;”;
var searchName = name + “=”;
var startOfCookie = myCookie.indexOf(searchName);
var endOfCookie;
if (startOfCookie != -1)
{
startOfCookie += searchName.length;
endOfCookie = myCookie.indexOf(“;”,startOfCookie);
result = unescape(myCookie.substring(startOfCookie, endOfCookie));
}

return result;
}</pre> 
  
注意：當設置cookie 到時候有域參數，那么在刪除的時候也要給定域，否則刪不掉的，這個問題鬧了一個小時。