function setCookie (name, value, expires) {	
      	if (!expires) expires = new Date();
         	document.cookie = name + "=" + escape (value) +     <!-- save cookie value
         "; expires=" + expires.toGMTString() +  "; path=/"; <!-- set expiration date		
 }   
	  
 function getCookie (name) {
         var dcookie = document.cookie; 
         var cname = name + "=";
         var clen = dcookie.length;
         var cbegin = 0;
             while (cbegin < clen) {
             var vbegin = cbegin + cname.length;
                 if (dcookie.substring(cbegin, vbegin) == cname) { 
                 var vend = dcookie.indexOf (";", vbegin);
                     if (vend == -1) vend = clen;
                 return unescape(dcookie.substring(vbegin, vend));
                 }
             cbegin = dcookie.indexOf(" ", cbegin) + 1;
                 if (cbegin == 0) break;
             }
         return null;
 }
		 
 function delCookie (name) {
         var expireNow = new Date();
         document.cookie = name + "=" +
         "; expires=Thu, 01-Jan-70 00:00:01 GMT" +  "; path=/";
 }