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);
        }