function delCookie (name) {
	var expiration_date = new Date ();
	expiration_date.setYear (expiration_date . getYear () + -1);
	expiration_date = expiration_date.toGMTString ();

	var cookie_string = escape (name) + "=" + "null" +
		"; expires=" + expiration_date;
	document.cookie = cookie_string;

	var cookie_string = escape (name) + "=" + "null" +
		"; expires=" + expiration_date +
		"; path=/" ;
	document.cookie = cookie_string;
}

function setCookie (name, value) {
	// Build the expiration date string:
	var expiration_date = new Date ();
	expiration_date.setYear (expiration_date . getYear () + 99);
	expiration_date = expiration_date.toGMTString ();
	var path = "/";

	//var cookie_string = escape (name) + "=" + escape (value) +
		//"; expires=" + expiration_date +
		//"; path=/" ;
	//document.cookie = cookie_string;

	var cookie_string = escape (name) + "=" + escape (value) +
		"; expires=" + expiration_date ;
	document.cookie = cookie_string;
}

function getCookie(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;
}