function once(command,id,interval){
	var mul = interval.substring(0,interval.indexOf(" "));
	mul = parseInt(mul);
	interval = interval.substring(interval.lastIndexOf(" ")+1,interval.length);
	if (interval == "sec"){ e = 1000; }
	else if (interval == "min"){ e = 60000; }
	else if (interval == "hour"){ e = 3600000; }
	else if (interval == "days"){ e = 86400000; }
	e = e * mul;
	var now = new Date();
	var ex = new Date();
	ex.setTime(now.getTime() + e);
	if (!getCookie(id)){
		eval(command);
		setCookie(id,"1",ex);
	}
}
function setCookie(name, value, expire){
	document.cookie = name + "=" + escape(value) + ((expire ==null) ? "" : ("; expires=" + expire.toGMTString()));
}
function getCookie(Name){
	var search = Name + "=";
	if (document.cookie.length > 0){
		offset = document.cookie.indexOf(search);
		if (offset != -1){
			offset += search.length;
			end = document.cookie.indexOf(";", offset);
			if (end == -1) {
				end = document.cookie.length;
			}
			return unescape(document.cookie.substring(offset, end));
		} else {
			return "";
		}
	} else {
		return "";
	}
}