function setCookie(cookieName,cvalue,expiredays,path)
{
	var expireDate=new Date();
	var expireStr="";
	if(expiredays!=null) {
		expireDate.setTime(expireDate.getTime()+(expiredays*24*3600*1000));
		expireStr="; expires="+expireDate.toGMTString();
	}
	pathStr=(path==null)?"; path=/":"; path="+path;
	document.cookie=cookieName+'='+escape(cvalue)+expireStr+pathStr;
}
function getCookie(cookieName)
{
	var index=-1;
 	if(document.cookie) 
 		index=document.cookie.indexOf(cookieName);
 	if(index==-1) {
 		return "";
 	} else {
 	     var iBegin = (document.cookie.indexOf("=", index) +1);
          var iEnd =document.cookie.indexOf(";", index);
          if (iEnd == -1)
          {
              iEnd = document.cookie.length;
          }
          return unescape(document.cookie.substring(iBegin,iEnd));
	}
}