//Ìí¼Ócookie
function setCookie(key,value,expiredays)
{
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+expiredays);
    document.cookie=key+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

   //»ñÈ¡cookie
function getCookie(name){
 var str=document.cookie.split("; ")
 for(var i=0;i<str.length;i++){
 var str2=str[i].split("=");
  if(str2[0]==name)
  {
  return str2[1];
  }
 }
}
//ɾ³ýcookie
function DelCookie(Key)
{
var expires = new Date();
expires.setTime(expires.getTime() - 1);
document.cookie = Key+"= ; expires=" + expires.toGMTString();
}
//escape unescape