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