function createCookie(name,value,days){if(days){var date = new Date();date.setTime(date.getTime()+(days*24*60*60*1000));var expires = "; expires="+date.toGMTString();}else var expires = "";document.cookie = name+"="+value+expires+"; path=/";}
function readCookie(name){var nameEQ = name + "=";var ca = document.cookie.split(';');for(var i=0;i < ca.length;i++){var c = ca[i];while(c.charAt(0)==' ') c = c.substring(1,c.length);if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);}return null;}
function eraseCookie(name){createCookie(name,"",-1);}
function delCookie(_value){var tuID;var tv;for(var i=1; i<=index; i++){tuID = readCookie("tk" + i.toString());if(tuID != ""){tv = readCookie(tuID);if(tv == _value){eraseCookie(tuID);eraseCookie("tk" + i.toString());}}}}
function allCookie()
{	
	var tuID;
	var tv;
	var idx = readCookie("index_name");
	for(var i=1; i<=idx; i++)
	{
		tuID = readCookie("tk" + i.toString());
		if(tuID != null)
		{			
			eraseCookie(tuID);
			eraseCookie("tk" + i.toString());			
		}
	}	
	eraseCookie("index_name");
}