function GetCookie (name) { 
var arg = name + "="; 
var alen = arg.length; 
var clen = window.document.cookie.length; 
var i = 0; 
while (i < clen) { 
var j = i + alen; 
if (window.document.cookie.substring(i, j) == arg) return getCookieVal (j); 
i = window.document.cookie.indexOf(" ", i) + 1; 
if (i == 0) break; 
} 
return null;
}

function getCookieVal (offset) { 
var endstr = window.document.cookie.indexOf (";", offset); 
if (endstr == -1) endstr = window.document.cookie.length; 
return decodeURI(window.document.cookie.substring(offset, endstr));
}
function SetCookie (name, value) { 
var exp = new Date(); 
exp.setTime(exp.getTime() + (30*24*60*60*1000));
window.document.cookie = name + "=" + encodeURI (value) + ";domain=.kaiqi.com; expires=" + exp.toGMTString()+";path=/";
}
function DeleteCookie (name) { 
var exp = new Date(); 
exp.setTime (exp.getTime() - 1); 
var cval = GetCookie (name); 
window.document.cookie = name + "=" + cval + ";domain=.kaiqi.com; expires=" + exp.toGMTString()+";path=/";
}