function setCookie (name, value, expires, path, domain, secure) { 
 document.cookie = name + "=" + escape(value) + 
 ((expires) ? "; expires=" + expires : "") + 
 ((path) ? "; path=" + path : "") + 
 ((domain) ? "; domain=" + domain : "") + 
 ((secure) ? "; secure" : ""); 
} 

function getCookie(name) { 
 var prefix = name + "=" 
 var cookieStartIndex = document.cookie.indexOf(prefix) 
 if (cookieStartIndex == -1) 
 return null 
 var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length) 
 if (cookieEndIndex == -1) 
 cookieEndIndex = document.cookie.length 
 return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex)) 
} 
function deleteCookie(name, path, domain) { 
 if (getCookie(name)) { 
 document.cookie = name + "=" + 
 ((path) ? "; path=" + path : "") + 
 ((domain) ? "; domain=" + domain : "") + 
 "; expires=Thu, 01-Jan-70 00:00:01 GMT" 
 }}