// GetCookie attempts to retrive the cookie named 'feedback1'
// If it is found then no feedback form is displayed

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;
}

// If no cookie named 'feedback1' is found then SetCookie is called
// to create it.  The cookie just contains the path and an expiry date
// 30 days in the future

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" : "");
}

// Cookie is deleted before being re-created

function DeleteCookie (name) { 
	var exp = new Date(); 
	exp.setTime (exp.getTime() - 1); 
	var cval = GetCookie (name); 
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

var expDays = 30;
var exp = new Date(); 
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

function CheckVisit(){
	var feedback1 = GetCookie('feedback1')
	if(feedback1 == null) {
		SetCookie('feedback1','1',exp)
		return 1
	}
	else {
		var newcount = parseInt(feedback1) + 1;
		DeleteCookie('feedback1')
		SetCookie('feedback1',newcount,exp)
		return newcount
	}
}

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