function get_cookie(cookiename){
	var allcookies = document.cookie;
	var pos = allcookies.indexOf(cookiename + "=");
	if(pos != -1){
		var start = pos + (cookiename.length + 1);
		var end = allcookies.indexOf(";", start);
		if(end == -1){ end = allcookies.length; }
		var value = allcookies.substring(start, end);
		value = unescape(value);
		return value;
		
	}else{
		return false;
	}
}
	
function set_cookie(name, value, domain, expires){
	if(expires == undefined){ 
		expires = new Date(); 
		expires.setFullYear(expires.getFullYear() + 1); 
	}
	var str = name + "=" + value +"; path=/; expires=" + expires.toGMTString();
	str += ((domain)  ? "; domain=" + domain : "");
	document.cookie = str;
}

function simpleCreateCookie(name, value) {
	document.cookie = name+"="+value+"; path=/";
	}
	
	
	function simpleReadCookie(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 simpleEraseCookie(name) {
			simpleCreateCookie(name,"",-1);
		}