var d = document;
var $c = {
	isEmpty:function(obj){
		for(var i in obj){ return false;}
		return true;
	},
	// Cookie functions from http://www.quirksmode.org/js/cookies.html
	clearCookie:function(name){
		$c.createCookie(name,"",-1);		
	},
	createCookie:function(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=/";
	},
	readCookie:function(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;		
	}
};