var menu_timeout=null;
 
 function checkCookie(){
	 var knowed=null;
	if(getCookie('knowed')!='undefined') 
	 {knowed=getCookie('knowed');}
   if (knowed==1){
	   		document.getElementById('navTips').style.display='none'; 
	   }else{
		   
			document.getElementById('navTips').style.display='block';
			document.getElementById('bbs_lnk').className='ico on';
			document.getElementById('downmenu').style.display='block';
			menu_timeout=setTimeout(function(){
			document.getElementById('bbs_lnk').className='ico';
			document.getElementById('downmenu').style.display='none';
			},3000);
			menu_timeout=setTimeout(function(){
			document.getElementById('navTips').style.display='none';
			},5000);
		}
	}//checkCookie end
	document.getElementById('navTips').onmouseover=function(){
		clearTimeout(menu_timeout);
		menu_timeout=setTimeout(function(){
			document.getElementById('bbs_lnk').className='ico on';
			document.getElementById('downmenu').style.display='block';
		},300);
	}
	document.getElementById('iknow').onclick=function(){
		document.getElementById('navTips').style.display='none';
		document.getElementById('bbs_lnk').className='ico';
		document.getElementById('downmenu').style.display='none';
		setCookie("knowed",1,15 * 60000);
		return false;	
	};

	document.getElementById('openTopPop').onmouseover=function(){
		clearTimeout(menu_timeout);
		menu_timeout=setTimeout(function(){
			document.getElementById('bbs_lnk').className='ico on';
			document.getElementById('downmenu').style.display='block';
		},300);
	}
	document.getElementById('openTopPop').onmouseout=function(){
		clearTimeout(menu_timeout);
		menu_timeout=setTimeout(function(){
			document.getElementById('bbs_lnk').className='ico';
			document.getElementById('downmenu').style.display='none';
			
		},300);
	}

function getCookie(c_name){
  if (document.cookie.length>0)
	{
	c_start=document.cookie.indexOf(c_name + "=")
	if (c_start!=-1)
	  { 
	  c_start=c_start + c_name.length+1 
	  c_end=document.cookie.indexOf(";",c_start)
	  if (c_end==-1) c_end=document.cookie.length
	  return unescape(document.cookie.substring(c_start,c_end))
	  } 
	}
  return "";
}	
function setCookie(c_name,value,expiredays){
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
	
}