function getCookieVal(offset) {
	var endstr=document.cookie.indexOf(";", offset);
	if (endstr==-1) {
		endstr=document.cookie.length;
	}
	return unescape(document.cookie.substring(offset, endstr));
}

function getCookie(name) {
	var arg=name + "=";
	var alen=arg.length;
	var clen=document.cookie.length;
	var i=0;
	while (i < clen) {
		var j=i + alen;
		if (document.cookie.substring(i, j) == arg) {
			return getCookieVal(j);
		}
		i=document.cookie.indexOf(" ", i) + 1;    
		if (i == 0) {
			break;   
		}
	}
	return null;
}

function setCookie(name, value) {
	var argv=setCookie.arguments;
	var argc=setCookie.arguments.length;
	var expires=(argc > 2) ? argv[2] : null;
	var path=(argc > 3) ? argv[3] : null;
	var domain=(argc > 4) ? argv[4] : null;
	var secure=(argc > 5) ? argv[5] : false;
	document.cookie=name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain))+ ((secure == true) ? "; secure" : "");
}

function deleteCookie(name) {
	var exp=new Date();
	exp.setTime(exp.getTime() - 1);
	// This cookie is history
	var cval=getCookie(name);
	document.cookie=name + "=" + cval + "; expires=" + exp.toGMTString();
}