// Ultimate client-side JavaScript client sniff. Version 3.03
// (C) Netscape Communications 1999-2001.  Permission granted to reuse and distribute.
// Revised 17 May 99 to add is_nav5up and is_ie5up (see below).
// Revised 20 Dec 00 to add is_gecko and change is_nav5up to is_nav6up
//                      also added support for IE5.5 Opera4&5 HotJava3 AOLTV
// Revised 22 Feb 01 to correct Javascript Detection for IE 5.x, Opera 4, 
//                      correct Opera 5 detection
//                      add support for winME and win2k
//                      synch with browser-type-oo.js
// Revised 26 Mar 01 to correct Opera detection
// Revised 02 Oct 01 to add IE6 detection

// Everything you always wanted to know about your JavaScript client
// but were afraid to ask. Creates "is_" variables indicating:
// (1) browser vendor:
//     is_nav, is_ie, is_opera, is_hotjava, is_webtv, is_TVNavigator, is_AOLTV
// (2) browser version number:
//     is_major (integer indicating major version number: 2, 3, 4 ...)
//     is_minor (float   indicating full  version number: 2.02, 3.01, 4.04 ...)
// (3) browser vendor AND major version number
//     is_nav2, is_nav3, is_nav4, is_nav4up, is_nav6, is_nav6up, is_gecko, is_ie3,
//     is_ie4, is_ie4up, is_ie5, is_ie5up, is_ie5_5, is_ie5_5up, is_ie6, is_ie6up, is_hotjava3, is_hotjava3up,
//     is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
// (4) JavaScript version number:
//     is_js (float indicating full JavaScript version number: 1, 1.1, 1.2 ...)
// (5) OS platform and version:
//     is_win, is_win16, is_win32, is_win31, is_win95, is_winnt, is_win98, is_winme, is_win2k
//     is_os2
//     is_mac, is_mac68k, is_macppc
//     is_unix
//     is_sun, is_sun4, is_sun5, is_suni86
//     is_irix, is_irix5, is_irix6
//     is_hpux, is_hpux9, is_hpux10
//     is_aix, is_aix1, is_aix2, is_aix3, is_aix4
//     is_linux, is_sco, is_unixware, is_mpras, is_reliant
//     is_dec, is_sinix, is_freebsd, is_bsd
//     is_vms
//
// See http://www.it97.de/JavaScript/JS_tutorial/bstat/navobj.html and
// http://www.it97.de/JavaScript/JS_tutorial/bstat/Browseraol.html
// for detailed lists of userAgent strings.
//
// Note: you don't want your Nav4 or IE4 code to "turn off" or
// stop working when new versions of browsers are released, so
// in conditional code forks, use is_ie5up ("IE 5.0 or greater") 
// is_opera5up ("Opera 5.0 or greater") instead of is_ie5 or is_opera5
// to check version in code which you want to work on future
// versions.

    // convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);


    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

    // KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
    // or if this is the first browser window opened.  Thus the
    // variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.
    var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_aol5  = (agt.indexOf("aol 5") != -1);
    var is_aol6  = (agt.indexOf("aol 6") != -1);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

    var is_webtv = (agt.indexOf("webtv") != -1); 

    var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
    var is_AOLTV = is_TVNavigator;

    var is_hotjava = (agt.indexOf("hotjava") != -1);
    var is_hotjava3 = (is_hotjava && (is_major == 3));
    var is_hotjava3up = (is_hotjava && (is_major >= 3));

    // *** JAVASCRIPT VERSION CHECK ***
    var is_js;
    if (is_nav2 || is_ie3) is_js = 1.0;
    else if (is_nav3) is_js = 1.1;
    else if (is_opera5up) is_js = 1.3;
    else if (is_opera) is_js = 1.1;
    else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;
    else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;
    else if (is_hotjava3up) is_js = 1.4;
    else if (is_nav6 || is_gecko) is_js = 1.5;
    // NOTE: In the future, update this code when newer versions of JS
    // are released. For now, we try to provide some upward compatibility
    // so that future versions of Nav and IE will show they are at
    // *least* JS 1.x capable. Always check for JS version compatibility
    // with > or >=.
    else if (is_nav6up) is_js = 1.5;
    // NOTE: ie5up on mac is 1.4
    else if (is_ie5up) is_js = 1.3

    // HACK: no idea for other browsers; always check for JS version with > or >=
    else is_js = 0.0;

    // *** PLATFORM ***
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
    // NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
    //        Win32, so you can't distinguish between Win95 and WinNT.
    var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

    // is this a 16 bit compiled version?
    var is_win16 = ((agt.indexOf("win16")!=-1) || 
               (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) || 
               (agt.indexOf("windows 16-bit")!=-1) );  

    var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||
                    (agt.indexOf("windows 16-bit")!=-1));

    var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
    var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1));

    // NOTE: Reliable detection of Win98 may not be possible. It appears that:
    //       - On Nav 4.x and before you'll get plain "Windows" in userAgent.
    //       - On Mercury client, the 32-bit version will return "Win98", but
    //         the 16-bit version running on Win98 will still return "Win95".
    var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
    var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
    var is_win32 = (is_win95 || is_winnt || is_win98 || 
                    ((is_major >= 4) && (navigator.platform == "Win32")) ||
                    (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

    var is_os2   = ((agt.indexOf("os/2")!=-1) || 
                    (navigator.appVersion.indexOf("OS/2")!=-1) ||   
                    (agt.indexOf("ibm-webexplorer")!=-1));

    var is_mac    = (agt.indexOf("mac")!=-1);
    // hack ie5 js version for mac
    if (is_mac && is_ie5up) is_js = 1.4;
    var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) || 
                               (agt.indexOf("68000")!=-1)));
    var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) || 
                                (agt.indexOf("powerpc")!=-1)));

    var is_sun   = (agt.indexOf("sunos")!=-1);
    var is_sun4  = (agt.indexOf("sunos 4")!=-1);
    var is_sun5  = (agt.indexOf("sunos 5")!=-1);
    var is_suni86= (is_sun && (agt.indexOf("i86")!=-1));
    var is_irix  = (agt.indexOf("irix") !=-1);    // SGI
    var is_irix5 = (agt.indexOf("irix 5") !=-1);
    var is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));
    var is_hpux  = (agt.indexOf("hp-ux")!=-1);
    var is_hpux9 = (is_hpux && (agt.indexOf("09.")!=-1));
    var is_hpux10= (is_hpux && (agt.indexOf("10.")!=-1));
    var is_aix   = (agt.indexOf("aix") !=-1);      // IBM
    var is_aix1  = (agt.indexOf("aix 1") !=-1);    
    var is_aix2  = (agt.indexOf("aix 2") !=-1);    
    var is_aix3  = (agt.indexOf("aix 3") !=-1);    
    var is_aix4  = (agt.indexOf("aix 4") !=-1);    
    var is_linux = (agt.indexOf("inux")!=-1);
    var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
    var is_unixware = (agt.indexOf("unix_system_v")!=-1); 
    var is_mpras    = (agt.indexOf("ncr")!=-1); 
    var is_reliant  = (agt.indexOf("reliantunix")!=-1);
    var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 
           (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 
           (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 
    var is_sinix = (agt.indexOf("sinix")!=-1);
    var is_freebsd = (agt.indexOf("freebsd")!=-1);
    var is_bsd = (agt.indexOf("bsd")!=-1);
    var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || 
                 is_sco ||is_unixware || is_mpras || is_reliant || 
                 is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

    var is_vms   = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));

// end browser detector code


var error = '';
if (error.length != 0) {
	document.writeln( '<table><tr><td><h3>QuickPolls Error</h3>'+error.length+'<p>' );
	switch (error) {
		case 'no_polls':
			document.writeln( 'There are no polls defined for this account.' );
			break;
		case 'no_account_id':
			document.writeln( 'No account id specified.' );
			break;
		
		default:
			break;
	}
	document.writeln( '</p></td></tr></table>' );
}


var pid = 505;
var response_blocking = true;
var poll_type = 'single-choice';
var question = "Is the war in Afghanistan worth fighting?";
var no_vote_result_view = 1;
var past_polls_url = '';
var this_poll_is_past = 0;
var site = 'http://www.bu.edu/com/';
var ssl_site = 'https://www.bu.edu/com/';
var error = '';
var disabled_cookies_msg = "Sorry, you must have cookies enabled to view polls.";
var unsup_browser_msg = "Sorry, you must have a more recent web browser (version 5+) to view polls.";
var php_dir = '/phpbin/quickpolls/poll/';
var multi_choice_msg = "Bar graphs show percent of "+'4'+" multiple-choice responses";




// the answers array contains an array for each possible answer to the poll. 
// the indexes of the 2nd dim. arrays correspond to the following values:
//		1 = the answer itself
//		2 = the number of votes for that answer
//		3 = the percentage of all votes that this comprises
//		4 = the id of the answer, in the database
var answers = new Array();

answers[0] = new Array( "Yes", 3, '75.0%', 2133 );

answers[1] = new Array( "No", 1, '25.0%', 2134 );


// check that the user has > v4 browser
// available browser check variables are:
//     is_nav2, is_nav3, is_nav4, is_nav4up, is_nav6, is_nav6up, is_gecko, is_ie3,
//     is_ie4, is_ie4up, is_ie5, is_ie5up, is_ie5_5, is_ie5_5up, is_ie6, is_ie6up, is_hotjava3, is_hotjava3up,
//     is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
if ((is_nav && !is_nav6up) || (is_ie && !is_ie5up) || (is_opera && !is_opera5up)) {
	document.writeln('<table width=100%><tr><td>' + question + '</td></tr>');
	document.writeln('<tr><td><table width=100%><tr><td>' + unsup_browser_msg + '</td></tr></table></td></tr>');
	document.writeln('<tr><td>&nbsp;</td></tr></table>');
}

// check that user has cookies enabled
else if (!cookietest()) {
	document.writeln('<table width=100% cellspacing=0 cellpadding=0 class="QP-current-poll"><tr><td class="QP-question">' + question + '</td></tr>');
	document.writeln('<tr><td><table class="QP-answers" width=100%><tr><td>' + disabled_cookies_msg + '</td></tr></table></td></tr>');
	document.writeln('<tr><td class="QP-submit-area">&nbsp;</td></tr></table>');
}

// check that this page can display this poll (overridden if doing an internal test)
else if (window.location.href.indexOf(site) == -1 && window.location.href.indexOf(ssl_site)) {
	document.writeln( '<h3>QuickPolls Error</h3><p>This page is not authorized to show this poll.</p>' );	
}

// OK, poll can be displayed.
else {

	// decide which view to give the user: 
	if (this_poll_is_past) {
		// if past poll, user sees results, cannot vote
		view = 'results';
		voted = true;
	
	} else {
		var cPid = getCookie('QP_pid');
		var cVoted = getCookie('QP_voted');

		setCookie('QP_pid', pid, 999);

		if (cPid == pid) {
			// user has been to this poll before, may have voted
			if (getCookie('QP_voted') == 1 && response_blocking){
				// user has voted and cannot vote again
				view = 'results';
				voted = true;
				setCookie('QP_voted', 1, 999);
			} else {
				// user may or may not have voted, but in either case is allowed to vote
				voted = false;
				if (getCookie('QP_view_results') == 1) {
					view = 'results';
					delCookie('QP_view_results');
				} else {
					view = 'vote';
				}
			}
		} else {
			// user has never seen this poll before
			view = 'vote';
			voted = false;
			delCookie('QP_voted');			// clear any cookies from old polls
			delCookie('QP_view_results');
		}
	}


	// show correct view
	if (view == 'results') {
		// begin table, show question
		document.writeln( '<table class="QP-current-poll" cellspacing=0 cellpadding=0 width=100%><tr><td class="QP-question">'+question+'</td></tr>' );
		document.writeln( '<tr><td><style><!-- #QP-answers-text-cell SPAN.QP-vote-slash {	display: none; } #QP-answers-text-cell SPAN.QP-vote-pct { display: none; } --></style><table class="QP-answers" width=100%>' );
		// show each answer, along with stats
		for (var i = 0; i < answers.length; i++) {
			answer = answers[i][0];
			vote_count = answers[i][1];
			vote_pct = answers[i][2];

			// display the answer text
			document.writeln( '<tr class="QP-answers-text-row"><td id="QP-answers-text-cell" class="QP-answers-text-cell">'+answer+' - <span class="QP-vote-count">'+vote_count+' vote'+(vote_count==1?'':'s')+' </span><span id="QP-vote-slash" class="QP-vote-slash"> / </span><span id="QP-vote-pct" class="QP-vote-pct"> '+vote_pct+'</span></td></tr>' );
		
			// display a (hopefully) colored bar, representing the vote percentage
			document.writeln( '<tr><td><table class="QP-bar-table" border=0 width="'+vote_pct+'" id="QP-answer-'+(i+1)+'" cellspacing=0 cellpadding=0><tr class="QP-bar-row"><td class="QP-bar-cell">&nbsp;</td></tr></table></td></tr>');
			if (i < answers.length - 1) {
				document.writeln( '<tr class="QP-spacer-row"><td class="QP-spacer-cell" style="font-size: 2px;">&nbsp</td></tr>' );
			}
		}
		document.writeln( '</table></td></tr>' );

		// end table, pos. show link to past polls, also link back to voting if the user has not voted
		if (poll_type == 'multiple-choice') {
				document.writeln( '<tr><td class="QP-submit-area"><em>'+multi_choice_msg+'</em></td></tr>');
		}
		if (this_poll_is_past != "1") {
		document.writeln( '<tr><td class="QP-submit-area">'+(past_polls_url?'<a href="'+past_polls_url+'">Past polls</a>':'')+(past_polls_url&&(!voted||!response_blocking)?'<br>':'')+(!voted||!response_blocking?'<span class="QP-vote-nav-link"><a href="#" onClick="return show_form();">Vote</a></span>':'&nbsp;')+'</td></tr></table>' );
		} else {
				document.writeln( '<tr><td class="QP-submit-area">'+(past_polls_url?'<a href="'+past_polls_url+'">Past polls</a>':'')+(past_polls_url&&(!voted||!response_blocking)?'<br>':'')+'</td></tr></table>' );
		}
	} else /* view == 'vote' */ {

/*
		if (getCookie('safariCookie') == 1) {
			delCookie('safariCookie');
			reload();
		} else {
			setCookie('safariCookie', 1, .25);
		}
*/
	

	
	
    //var currentTime = new Date();
	
		// begin table/form, show question
		document.writeln( '<form class="QPForm" name="QPForm" id="QPForm" method="post" action="http://www.bu.edu'+php_dir+'vote.php" onsubmit="set_voted_cookie()">' );
		document.writeln( '<input type="hidden" name="url" value="'+window.location+'">' );
		document.writeln( '<input type="hidden" name="pid" value="'+pid+'">' );
		document.writeln( '<table class="QP-current-poll" cellspacing=0 cellpadding=0 width=100%><tr><td class="QP-question">'+question+'</td></tr>' );
		
		// show the answers
		document.writeln( '<tr><td><table class="QP-answers" width=100%>' );
		for (var i = 0; i < answers.length; i++) {
			answer = answers[i][0];
			answer_id = answers[i][3];
	
			// display the form element
			document.writeln( '<tr><td align=right valign="top" width=1><input class="QP-input-field" name="answer-'+answer_id+'" type="'+(poll_type == 'multiple-choice' ? 'checkbox' : 'radio')+'" onClick="clear_options(this, answers.length, answers);"></td>' );
			
			// display the answer text
			document.writeln( '<td colspan="2" class="QP-answer-cell">'+answer+'</td></tr>' );
	
			//if (i < answers.length - 1) { // commented out by gaudette July 12 2005
			//	document.writeln( '<tr class="QP-spacer-row"><td class="QP-spacer-cell" style="font-size: 2px;">&nbsp</td></tr>' );
			//}
		}
		document.writeln( '</table></td></tr>' );
	
		// end table, pos. show link(s) to results/past polls
		document.writeln( '<tr><td width=100%><table class="QP-submit-area" width=100%><tr class="QP-submit-area-row"><td width=20% class="QP-submit-area">' );
//		document.writeln( '<input type="submit" name="vote" value="Vote" onClick="set_voted_cookie(); submit();"></td>' ); /* IE submits this twice */
//		document.writeln( '<input type="button" name="vote" value="Vote" onClick="set_voted_cookie(); submit();"></td>' ); /* won't work for "enter" key submission /*
		document.writeln( '<input type="submit" name="vote" value="Vote" class="QP-submit-button"></td>' );
		document.writeln( '<td width=80% class="QP-submit-area"><span class="QP-view-results-link">'+(past_polls_url?'<a href="'+past_polls_url+'">Past polls</a></span>':'') );
		document.writeln( (past_polls_url&&no_vote_result_view?'<br>':'')+(no_vote_result_view?'<a href="#" onclick="return show_results();">View results</a>':'')+'</td></tr></table>' );
		document.writeln( '</tr></td></table></form>' );
	}

}


function show_results() {
	// set the show results cookie
	var name = 'QP_view_results';
	var value = 1;
	var expiredays = 1;
	setCookie(name, value, expiredays);

	// reload the current page
	reload(true);
	return false;
}

function show_form() {
	// unset the show results cookie
	//delCookie('QP_view_results');

	// reload the current page
	reload(true);
	return false;
}

function reload(refetch) {
	// reload the current page
	window.location.reload( refetch );	
}

// cookie get and set functions, from http://www.echoecho.com/jscookies02.htm
function getCookie(NameOfCookie) { 
	if (document.cookie.length > 0) { 
		begin = document.cookie.indexOf(NameOfCookie+"=");
		if (begin != -1) { 
			begin += NameOfCookie.length+1;
			end = document.cookie.indexOf(";", begin);
			if (end == -1) 
				end = document.cookie.length;
			return unescape(document.cookie.substring(begin, end)); 
		}
	}
	return null;
}

function setCookie(NameOfCookie, value, expiredays) { 
	var ExpireDate = new Date ();
	ExpireDate.setTime(ExpireDate.getTime() + (expiredays * 24 * 3600 * 1000));
	document.cookie = NameOfCookie + "=" + escape(value) + 
		((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());
}

function delCookie (NameOfCookie) { 
	if (getCookie(NameOfCookie)) {
		document.cookie = NameOfCookie + "=" + "; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}

// cookietest: tests if cookies are enabled
function cookietest() {
	setCookie('QP_test', 'true', .25);

	if (getCookie('QP_test') == 'true') {
		delCookie('QP_test');
		return true;
	}
	else return false;
}

function clear_options(exception, num_options, answers) {	
	if (exception.type == 'checkbox') {
		return;
	}
	form = document.QPForm;
	for (var i = 0; i < num_options; i++) {
		id = answers[i][3];
		if (exception.name != 'answer-'+id) {
			form['answer-'+id].checked = false;
		}		
	}
}

function set_voted_cookie() {
	setCookie('QP_voted', 1, 999);
	setCookie('QP_view_results', 1, 1);
}