function ResetCookie()
  	{
 	var thisdate=new Date();
	var now		=thisdate.getTime();
	var tomorrow=now+(1000*60*60*24);
	var nextday	=new Date(tomorrow);

	var name	   	=	" monitorwidth " ;
	var windowwidth	= window.screen.availWidth;
	var expirydate 	= nextday.toUTCString();
	var the_cookie	="cookie_name="+name+":windowsize="+windowwidth+ ":path=/"+":expires="+expirydate;
	document.cookie	= the_cookie;
    }