// code by youngki : 01/05/2009
	// cookie save 4k
	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 null 
   }

   function setCookie(c_name, value, expireNumbers, isDate, domain){ 
			var exdate=new Date() 
			if(isDate==null||isDate=="") exdate.setDate(exdate.getDate()+expireNumbers);
			else if(isDate=='hour') exdate.setTime(exdate.getTime() + (60*60*1000*expireNumbers));
			var cook = c_name + "=" + escape( value ) + "; path=/; " + ((expireNumbers==null) ? "" : ";expires="+exdate.toUTCString()) + ";";
			if (domain) cook += "domain=" + domain + ";";
			document.cookie = cook;
   }

   function checkCookie(c_name){ 
           cookname=getCookie(c_name) 
           if (cookname!=null) { 
					return cookname;
           }else { 
					return false;
           } 
   } 

   function checkCookieAlert(c_name){ 
           cookname=getCookie(c_name) 
           if (cookname!=null) { 
                   alert('Exists : ' + c_name + '=' + cookname + '!');
           }else { 
                   alert('No Exists !');  
           } 
   }