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, expires, path, domain, secure) {
      document.cookie = name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
	}
	function _setCookie(name,value){
		if (value){
	   	setCookie(name,value,"Mon, 01-Jan-2037 00:00:00 GMT","/");
	   } else {
	   	deleteCookie(name,"/");
	   }
	}
	function deleteCookie (name,path,domain) {
		if (getCookie(name)) {
			document.cookie = name + "=" +
				((path) ? "; path=" + path : "") +
				((domain) ? "; domain=" + domain : "") +
				"; expires=Thu, 01-Jan-70 00:00:01 GMT";
		}
	}