var newWin = null;

function launchNewWin(URL, windowName, windowWidth, windowHeight, scrollbars)
{
	var xposition = 400; 
	var yposition = 300;
	
    if ((parseInt(navigator.appVersion) >= 4 )) {
        xposition = (screen.width - windowWidth) / 2;
        yposition = (screen.height - windowHeight) / 2;
    }
	
	if (!scrollbars) var scrollbars = 0;
	
    var args = "width=" + windowWidth + ","
	    	+ "height=" + windowHeight + ","
	    	+ "location=0,"
		    + "menubar=0,"
		    + "scrollbars=" + scrollbars + ","
		    + "status=0,"
		    + "titlebar=0,"
		    + "hotkeys=0,"
		    + "screenx=" + xposition + ","  // NN Only
		    + "screeny=" + yposition + ","  // NN Only
		    + "left=" + xposition + ","     // IE Only
		    + "top=" + yposition;           // IE Only
		
	if (newWin != null && !newWin.closed) {
		newWin.close();
	}
	newWin = window.open(URL, windowName, args);
	
	newWin.focus();
}

function setCookie(name, value, expiration, path, domain, secure)
{
	if (name != "" && value != "")
	{
		var thisCookie = name + "=" + escape(value);
		if (expiration) thisCookie += '; expires=' + new Date((new Date()).getTime() + expiration * 3600000).toGMTString();
		if (path) thisCookie += '; path=' + path;
		if (domain) thisCookie += '; domain=' + domain;
		if (secure) thisCookie += '; secure';
		
    	document.cookie = thisCookie;
	}
}

function getCookie(name)
{
	var cookies = document.cookie;
    var value = "";
    var start = cookies.indexOf(name + '=');
    var end = 0;
	if (start == -1) value = null;
    else {
		start += name.length + 1;
    	end = cookies.indexOf(';', start);
        if (end == -1) end = cookies.length;
    	value = unescape(cookies.substring(start, end));
	}
    return value;
}

function submitEmailForm(email)
{
	var formObj = document.forms['emailForm'];
	
	formObj.email.value = email;
	
	var URL = "../php/popup.php?category=email_form";
	
	launchNewWin(URL, 'newWin', 380, 300);
	
	formObj.target = 'newWin';
	
	formObj.submit();
}

function launchVideoGalleryWin(videoID)
{
	var URL = '../php/popup.php?category=video_gallery&videoID=' + videoID;
	
	launchNewWin(URL, 'newWin', 380, 300);
}

function validateVoter(pollID)
{
	var registeredPollID = getCookie("Madonna_Polls");

	if (registeredPollID == pollID)
	{
		return false;
	}
	else return true;
}

function registerVoter(pollID)
{
	setCookie("Madonna_Polls", pollID, 10000, "/");
}

function vote(pollID)
{
	if (validateVoter(pollID))
	{
		registerVoter(pollID);
		
		formObj.submit();
	}
	else {
		alert("You may only vote once per poll.\nThanks for your vote.");
	}
}