var aAnswers = new Array();

aAnswers[0] = 0;

var i = 1;
while(i < 30){
	aAnswers[i] = 0;
	i++;
}

function trim(s)
{
	return rtrim(ltrim(s));
}

function ltrim(s)
{
	var l=0;
	while(l < s.length && s[l] == ' ')
	{	l++; }
	return s.substring(l, s.length);
}

function rtrim(s)
{
	var r=s.length -1;
	while(r > 0 && s[r] == ' ')
	{	r-=1;	}
	return s.substring(0, r+1);
}


function calculate(){
	var myTotal = 0;
	for (i=0; i < aAnswers.length; ++i){
		if(aAnswers[i] == 1){
			myTotal++;
		}
	}
	if(myTotal >= 30){
		var i = 1;
		while(i < 30){
			if(i<10){
				document.getElementById('a0'+i).disabled;
			}else{
				document.getElementById('a'+i).disabled;
			}
			i++;
		}
		
		alert("CONGRATULATIONS!\n\nYou've got 30 lyrics correct! You are now eligible to enter the prize draw.\n\nScroll to the bottom of the page to enter the prize draw!");
		disableAllFields()
		document.getElementById('footerContainer').style.display = "block";
		window.location.hash="#bottom";
	}else{
		document.getElementById('footerContainer').style.display = "none";
	}
}

function disableAllFields(){
var f = document.getElementsByTagName('input');
for(var i=0;i<60;i++){
if(f[i].getAttribute('type')=='text'){
f[i].setAttribute('disabled',true);
}
}
}

function check(el){
	
	if((el.id == "a01") && (trim(el.value).toLowerCase().toLowerCase() == "razorlight") && (trim(document.getElementById('s01').value.toLowerCase()) == "america")){ document.c01.src='_graphics/tick.gif'; aAnswers[1] = 1; calculate(); }
	if((el.id == "a01") && (trim(el.value).toLowerCase().toLowerCase() != "razorlight")){ document.c01.src='_graphics/cross.gif'; aAnswers[1] = 0; calculate(); }
	if((el.id == "s01") && (trim(el.value).toLowerCase().toLowerCase() == "america") && (trim(document.getElementById('a01').value.toLowerCase()) == "razorlight")){ document.c01.src='_graphics/tick.gif'; aAnswers[1] = 1; calculate(); }
	if((el.id == "s01") && (trim(el.value).toLowerCase().toLowerCase() != "america")){ 	document.c01.src='_graphics/cross.gif'; aAnswers[1] = 0; calculate(); }
	
	if((el.id == "a02") && (trim(el.value).toLowerCase().toLowerCase() == "metallica") && (trim(document.getElementById('s02').value.toLowerCase()) == "enter sandman")){ document.c02.src='_graphics/tick.gif'; aAnswers[2] = 1; calculate(); }
	if((el.id == "a02") && (trim(el.value).toLowerCase().toLowerCase() != "metallica")){ document.c02.src='_graphics/cross.gif'; aAnswers[2] = 0; calculate(); }
	if((el.id == "s02") && (trim(el.value).toLowerCase().toLowerCase() == "enter sandman") && (trim(document.getElementById('a02').value.toLowerCase()) == "metallica")){ document.c02.src='_graphics/tick.gif'; aAnswers[2] = 1; calculate(); }
	if((el.id == "s02") && (trim(el.value).toLowerCase().toLowerCase() != "enter sandman")){ 	document.c02.src='_graphics/cross.gif'; aAnswers[2] = 0; calculate(); }
	
	if((el.id == "a03") && (trim(el.value).toLowerCase() == "jay z") && (trim(document.getElementById('s03').value.toLowerCase()) == "99 problems")){ document.c03.src='_graphics/tick.gif'; aAnswers[3] = 1; calculate(); }
	if((el.id == "a03") && (trim(el.value).toLowerCase() != "jay z")){ document.c03.src='_graphics/cross.gif'; aAnswers[3] = 0; calculate(); }
	if((el.id == "s03") && (trim(el.value).toLowerCase() == "99 problems") && (trim(document.getElementById('a03').value.toLowerCase()) == "jay z")){ document.c03.src='_graphics/tick.gif'; aAnswers[3] = 1; calculate(); }
	if((el.id == "s03") && (trim(el.value).toLowerCase() != "99 problems")){ 	document.c03.src='_graphics/cross.gif'; aAnswers[3] = 0; calculate(); }
	
	if((el.id == "a04") && (trim(el.value).toLowerCase() == "the killers") && (trim(document.getElementById('s04').value.toLowerCase()) == "human")){ document.c04.src='_graphics/tick.gif'; aAnswers[4] = 1; calculate(); }
	if((el.id == "a04") && (trim(el.value).toLowerCase() != "the killers")){ document.c04.src='_graphics/cross.gif'; aAnswers[4] = 0; calculate(); }
	if((el.id == "s04") && (trim(el.value).toLowerCase() == "human") && (trim(document.getElementById('a04').value.toLowerCase()) == "the killers")){ document.c04.src='_graphics/tick.gif'; aAnswers[4] = 1; calculate(); }
	if((el.id == "s04") && (trim(el.value).toLowerCase() != "human")){ 	document.c04.src='_graphics/cross.gif'; aAnswers[4] = 0; calculate(); }
	
	if((el.id == "a05") && (trim(el.value).toLowerCase() == "mr g") && (trim(document.getElementById('s05').value.toLowerCase()) == "summer heights high")){ document.c05.src='_graphics/tick.gif'; aAnswers[5] = 1; calculate(); }
	if((el.id == "a05") && (trim(el.value).toLowerCase() != "mr g")){ document.c05.src='_graphics/cross.gif'; aAnswers[5] = 0; calculate(); }
	if((el.id == "s05") && (trim(el.value).toLowerCase() == "summer heights high") && (trim(document.getElementById('a05').value.toLowerCase()) == "mr g")){ document.c05.src='_graphics/tick.gif'; aAnswers[5] = 1; calculate(); }
	if((el.id == "s05") && (trim(el.value).toLowerCase() != "summer heights high")){ 	document.c05.src='_graphics/cross.gif'; aAnswers[5] = 0; calculate(); }

	if((el.id == "a06") && (trim(el.value).toLowerCase() == "snap") && (trim(document.getElementById('s06').value.toLowerCase()) == "rhythm is a dancer")){ document.c06.src='_graphics/tick.gif'; aAnswers[6] = 1; calculate(); }
	if((el.id == "a06") && (trim(el.value).toLowerCase() != "snap")){ document.c06.src='_graphics/cross.gif'; aAnswers[6] = 0; calculate(); }
	if((el.id == "s06") && (trim(el.value).toLowerCase() == "rhythm is a dancer") && (trim(document.getElementById('a06').value.toLowerCase()) == "snap")){ document.c06.src='_graphics/tick.gif'; aAnswers[6] = 1; calculate(); }
	if((el.id == "s06") && (trim(el.value).toLowerCase() != "rhythm is a dancer")){ 	document.c06.src='_graphics/cross.gif'; aAnswers[6] = 0; calculate(); }
	
	if((el.id == "a07") && (trim(el.value).toLowerCase() == "noah and the whale") && (trim(document.getElementById('s07').value.toLowerCase()) == "5 years time")){ document.c07.src='_graphics/tick.gif'; aAnswers[7] = 1; calculate(); }
	if((el.id == "a07") && (trim(el.value).toLowerCase() != "noah and the whale")){ document.c07.src='_graphics/cross.gif'; aAnswers[7] = 0; calculate(); }
	if((el.id == "s07") && (trim(el.value).toLowerCase() == "5 years time") && (trim(document.getElementById('a07').value.toLowerCase()) == "noah and the whale")){ document.c07.src='_graphics/tick.gif'; aAnswers[7] = 1; calculate(); }
	if((el.id == "s07") && (trim(el.value).toLowerCase() != "5 years time")){ 	document.c07.src='_graphics/cross.gif'; aAnswers[7] = 0; calculate(); }
	
	if((el.id == "a08") && (trim(el.value).toLowerCase() == "kings of leon") && (trim(document.getElementById('s08').value.toLowerCase()) == "sex on fire")){ document.c08.src='_graphics/tick.gif'; aAnswers[8] = 1; calculate(); }
	if((el.id == "a08") && (trim(el.value).toLowerCase() != "kings of leon")){ document.c08.src='_graphics/cross.gif'; aAnswers[8] = 0; calculate(); }
	if((el.id == "s08") && (trim(el.value).toLowerCase() == "sex on fire") && (trim(document.getElementById('a08').value.toLowerCase()) == "kings of leon")){ document.c08.src='_graphics/tick.gif'; aAnswers[8] = 1; calculate(); }
	if((el.id == "s08") && (trim(el.value).toLowerCase() != "sex on fire")){ 	document.c08.src='_graphics/cross.gif'; aAnswers[8] = 0; calculate(); }
	
	if((el.id == "a09") && (trim(el.value).toLowerCase() == "britney") && (trim(document.getElementById('s09').value.toLowerCase()) == "womanizer")){ document.c09.src='_graphics/tick.gif'; aAnswers[9] = 1; calculate(); }
	if((el.id == "a09") && (trim(el.value).toLowerCase() != "britney")){ document.c09.src='_graphics/cross.gif'; aAnswers[9] = 0; calculate(); }
	if((el.id == "s09") && (trim(el.value).toLowerCase() == "womanizer") && (trim(document.getElementById('a09').value.toLowerCase()) == "britney")){ document.c09.src='_graphics/tick.gif'; aAnswers[9] = 1; calculate(); }
	if((el.id == "s09") && (trim(el.value).toLowerCase() != "womanizer")){ 	document.c09.src='_graphics/cross.gif'; aAnswers[9] = 0; calculate(); }
	
	if((el.id == "a10") && (trim(el.value).toLowerCase() == "take that") && (trim(document.getElementById('s10').value.toLowerCase()) == "the greatest day")){ document.c10.src='_graphics/tick.gif'; aAnswers[10] = 1; calculate(); }
	if((el.id == "a10") && (trim(el.value).toLowerCase() != "take that")){ document.c10.src='_graphics/cross.gif'; aAnswers[10] = 0; calculate(); }
	if((el.id == "s10") && (trim(el.value).toLowerCase() == "the greatest day") && (trim(document.getElementById('a10').value.toLowerCase()) == "take that")){ document.c10.src='_graphics/tick.gif'; aAnswers[10] = 1; calculate(); }
	if((el.id == "s10") && (trim(el.value).toLowerCase() != "the greatest day")){ 	document.c10.src='_graphics/cross.gif'; aAnswers[10] = 0; calculate(); }
	
	
	
	if((el.id == "a11") && (trim(el.value).toLowerCase() == "beyonce") && (trim(document.getElementById('s11').value.toLowerCase()) == "if i were a boy")){ document.c11.src='_graphics/tick.gif'; aAnswers[11] = 1; calculate(); }
	if((el.id == "a11") && (trim(el.value).toLowerCase() != "beyonce")){ document.c11.src='_graphics/cross.gif'; aAnswers[11] = 0; calculate(); }
	if((el.id == "s11") && (trim(el.value).toLowerCase() == "if i were a boy") && (trim(document.getElementById('a11').value.toLowerCase()) == "beyonce")){ document.c11.src='_graphics/tick.gif'; aAnswers[11] = 1; calculate(); }
	if((el.id == "s11") && (trim(el.value).toLowerCase() != "if i were a boy")){ 	document.c11.src='_graphics/cross.gif'; aAnswers[11] = 0; calculate(); }
	
	if((el.id == "a12") && (trim(el.value).toLowerCase() == "ne-yo") && (trim(document.getElementById('s12').value.toLowerCase()) == "closer")){ document.c12.src='_graphics/tick.gif'; aAnswers[12] = 1; calculate(); }
	if((el.id == "a12") && (trim(el.value).toLowerCase() != "ne-yo")){ document.c12.src='_graphics/cross.gif'; aAnswers[12] = 0; calculate(); }
	if((el.id == "s12") && (trim(el.value).toLowerCase() == "closer") && (trim(document.getElementById('a12').value.toLowerCase()) == "ne-yo")){ document.c12.src='_graphics/tick.gif'; aAnswers[12] = 1; calculate(); }
	if((el.id == "s12") && (trim(el.value).toLowerCase() != "closer")){ 	document.c12.src='_graphics/cross.gif'; aAnswers[12] = 0; calculate(); }
	
	if((el.id == "a13") && (trim(el.value).toLowerCase() == "wham") && (trim(document.getElementById('s13').value.toLowerCase()) == "last christmas")){ document.c13.src='_graphics/tick.gif'; aAnswers[13] = 1; calculate(); }
	if((el.id == "a13") && (trim(el.value).toLowerCase() != "wham")){ document.c13.src='_graphics/cross.gif'; aAnswers[13] = 0; calculate(); }
	if((el.id == "s13") && (trim(el.value).toLowerCase() == "last christmas") && (trim(document.getElementById('a13').value.toLowerCase()) == "wham")){ document.c13.src='_graphics/tick.gif'; aAnswers[13] = 1; calculate(); }
	if((el.id == "s13") && (trim(el.value).toLowerCase() != "last christmas")){ 	document.c13.src='_graphics/cross.gif'; aAnswers[13] = 0; calculate(); }
	
	if((el.id == "a14") && (trim(el.value).toLowerCase() == "duffy") && (trim(document.getElementById('s14').value.toLowerCase()) == "mercy")){ document.c14.src='_graphics/tick.gif'; aAnswers[14] = 1; calculate(); }
	if((el.id == "a14") && (trim(el.value).toLowerCase() != "duffy")){ document.c14.src='_graphics/cross.gif'; aAnswers[14] = 0; calculate(); }
	if((el.id == "s14") && (trim(el.value).toLowerCase() == "mercy") && (trim(document.getElementById('a14').value.toLowerCase()) == "duffy")){ document.c14.src='_graphics/tick.gif'; aAnswers[14] = 1; calculate(); }
	if((el.id == "s14") && (trim(el.value).toLowerCase() != "mercy")){ 	document.c14.src='_graphics/cross.gif'; aAnswers[14] = 0; calculate(); }
	
	if((el.id == "a15") && (trim(el.value).toLowerCase() == "adele") && (trim(document.getElementById('s15').value.toLowerCase()) == "chasing pavements")){ document.c15.src='_graphics/tick.gif'; aAnswers[15] = 1; calculate(); }
	if((el.id == "a15") && (trim(el.value).toLowerCase() != "adele")){ document.c15.src='_graphics/cross.gif'; aAnswers[15] = 0; calculate(); }
	if((el.id == "s15") && (trim(el.value).toLowerCase() == "chasing pavements") && (trim(document.getElementById('a15').value.toLowerCase()) == "adele")){ document.c15.src='_graphics/tick.gif'; aAnswers[15] = 1; calculate(); }
	if((el.id == "s15") && (trim(el.value).toLowerCase() != "chasing pavements")){ 	document.c15.src='_graphics/cross.gif'; aAnswers[15] = 0; calculate(); }

	if((el.id == "a16") && (trim(el.value).toLowerCase() == "amy winehouse") && (trim(document.getElementById('s16').value.toLowerCase()) == "rehab")){ document.c16.src='_graphics/tick.gif'; aAnswers[16] = 1; calculate(); }
	if((el.id == "a16") && (trim(el.value).toLowerCase() != "amy winehouse")){ document.c16.src='_graphics/cross.gif'; aAnswers[16] = 0; calculate(); }
	if((el.id == "s16") && (trim(el.value).toLowerCase() == "rehab") && (trim(document.getElementById('a16').value.toLowerCase()) == "amy winehouse")){ document.c16.src='_graphics/tick.gif'; aAnswers[16] = 1; calculate(); }
	if((el.id == "s16") && (trim(el.value).toLowerCase() != "rehab")){ 	document.c16.src='_graphics/cross.gif'; aAnswers[16] = 0; calculate(); }
	
	if((el.id == "a17") && (trim(el.value).toLowerCase() == "girls aloud") && (trim(document.getElementById('s17').value.toLowerCase()) == "the promise")){ document.c17.src='_graphics/tick.gif'; aAnswers[17] = 1; calculate(); }
	if((el.id == "a17") && (trim(el.value).toLowerCase() != "girls aloud")){ document.c17.src='_graphics/cross.gif'; aAnswers[17] = 0; calculate(); }
	if((el.id == "s17") && (trim(el.value).toLowerCase() == "the promise") && (trim(document.getElementById('a17').value.toLowerCase()) == "girls aloud")){ document.c17.src='_graphics/tick.gif'; aAnswers[17] = 1; calculate(); }
	if((el.id == "s17") && (trim(el.value).toLowerCase() != "the promise")){ 	document.c17.src='_graphics/cross.gif'; aAnswers[17] = 0; calculate(); }
	
	if((el.id == "a18") && (trim(el.value).toLowerCase() == "sam sparro") && (trim(document.getElementById('s18').value.toLowerCase()) == "black and gold")){ document.c18.src='_graphics/tick.gif'; aAnswers[18] = 1; calculate(); }
	if((el.id == "a18") && (trim(el.value).toLowerCase() != "sam sparro")){ document.c18.src='_graphics/cross.gif'; aAnswers[18] = 0; calculate(); }
	if((el.id == "s18") && (trim(el.value).toLowerCase() == "black and gold") && (trim(document.getElementById('a18').value.toLowerCase()) == "sam sparro")){ document.c18.src='_graphics/tick.gif'; aAnswers[18] = 1; calculate(); }
	if((el.id == "s18") && (trim(el.value).toLowerCase() != "black and gold")){ 	document.c18.src='_graphics/cross.gif'; aAnswers[18] = 0; calculate(); }
	
	if((el.id == "a19") && (trim(el.value).toLowerCase() == "estelle") && (trim(document.getElementById('s19').value.toLowerCase()) == "american boy")){ document.c19.src='_graphics/tick.gif'; aAnswers[19] = 1; calculate(); }
	if((el.id == "a19") && (trim(el.value).toLowerCase() != "estelle")){ document.c19.src='_graphics/cross.gif'; aAnswers[19] = 0; calculate(); }
	if((el.id == "s19") && (trim(el.value).toLowerCase() == "american boy") && (trim(document.getElementById('a19').value.toLowerCase()) == "estelle")){ document.c19.src='_graphics/tick.gif'; aAnswers[19] = 1; calculate(); }
	if((el.id == "s19") && (trim(el.value).toLowerCase() != "american boy")){ 	document.c19.src='_graphics/cross.gif'; aAnswers[19] = 0; calculate(); }
	
	if((el.id == "a20") && (trim(el.value).toLowerCase() == "kanye west") && (trim(document.getElementById('s20').value.toLowerCase()) == "stronger")){ document.c20.src='_graphics/tick.gif'; aAnswers[20] = 1; calculate(); }
	if((el.id == "a20") && (trim(el.value).toLowerCase() != "kanye west")){ document.c20.src='_graphics/cross.gif'; aAnswers[20] = 0; calculate(); }
	if((el.id == "s20") && (trim(el.value).toLowerCase() == "stronger") && (trim(document.getElementById('a20').value.toLowerCase()) == "kanye west")){ document.c20.src='_graphics/tick.gif'; aAnswers[20] = 1; calculate(); }
	if((el.id == "s20") && (trim(el.value).toLowerCase() != "stronger")){ 	document.c20.src='_graphics/cross.gif'; aAnswers[20] = 0; calculate(); }
	
	
	
	if((el.id == "a21") && (trim(el.value).toLowerCase() == "nickelback") && (trim(document.getElementById('s21').value.toLowerCase()) == "rockstar")){ document.c21.src='_graphics/tick.gif'; aAnswers[21] = 1; calculate(); }
	if((el.id == "a21") && (trim(el.value).toLowerCase() != "nickelback")){ document.c21.src='_graphics/cross.gif'; aAnswers[21] = 0; calculate(); }
	if((el.id == "s21") && (trim(el.value).toLowerCase() == "rockstar") && (trim(document.getElementById('a21').value.toLowerCase()) == "nickelback")){ document.c21.src='_graphics/tick.gif'; aAnswers[21] = 1; calculate(); }
	if((el.id == "s21") && (trim(el.value).toLowerCase() != "rockstar")){ 	document.c21.src='_graphics/cross.gif'; aAnswers[21] = 0; calculate(); }
	
	if((el.id == "a22") && (trim(el.value).toLowerCase() == "coldplay") && (trim(document.getElementById('s22').value.toLowerCase()) == "viva la vida")){ document.c22.src='_graphics/tick.gif'; aAnswers[22] = 1; calculate(); }
	if((el.id == "a22") && (trim(el.value).toLowerCase() != "coldplay")){ document.c22.src='_graphics/cross.gif'; aAnswers[22] = 0; calculate(); }
	if((el.id == "s22") && (trim(el.value).toLowerCase() == "viva la vida") && (trim(document.getElementById('a22').value.toLowerCase()) == "coldplay")){ document.c22.src='_graphics/tick.gif'; aAnswers[22] = 1; calculate(); }
	if((el.id == "s22") && (trim(el.value).toLowerCase() != "viva la vida")){ 	document.c22.src='_graphics/cross.gif'; aAnswers[22] = 0; calculate(); }
	
	if((el.id == "a23") && (trim(el.value).toLowerCase() == "iglu and hartly") && (trim(document.getElementById('s23').value.toLowerCase()) == "in this city")){ document.c23.src='_graphics/tick.gif'; aAnswers[23] = 1; calculate(); }
	if((el.id == "a23") && (trim(el.value).toLowerCase() != "iglu and hartly")){ document.c23.src='_graphics/cross.gif'; aAnswers[23] = 0; calculate(); }
	if((el.id == "s23") && (trim(el.value).toLowerCase() == "in this city") && (trim(document.getElementById('a23').value.toLowerCase()) == "iglu and hartly")){ document.c23.src='_graphics/tick.gif'; aAnswers[23] = 1; calculate(); }
	if((el.id == "s23") && (trim(el.value).toLowerCase() != "in this city")){ 	document.c23.src='_graphics/cross.gif'; aAnswers[23] = 0; calculate(); }
	
	if((el.id == "a24") && (trim(el.value).toLowerCase() == "band aid") && (trim(document.getElementById('s24').value.toLowerCase()) == "do they know it's christmas")){ document.c24.src='_graphics/tick.gif'; aAnswers[24] = 1; calculate(); }
	if((el.id == "a24") && (trim(el.value).toLowerCase() != "band aid")){ document.c24.src='_graphics/cross.gif'; aAnswers[24] = 0; calculate(); }
	if((el.id == "s24") && (trim(el.value).toLowerCase() == "do they know it's christmas") && (trim(document.getElementById('a24').value.toLowerCase()) == "band aid")){ document.c24.src='_graphics/tick.gif'; aAnswers[24] = 1; calculate(); }
	if((el.id == "s24") && (trim(el.value).toLowerCase() != "do they know it's christmas")){ 	document.c24.src='_graphics/cross.gif'; aAnswers[24] = 0; calculate(); }
	
	if((el.id == "a25") && (trim(el.value).toLowerCase() == "leona lewis") && (trim(document.getElementById('s25').value.toLowerCase()) == "bleeding love")){ document.c25.src='_graphics/tick.gif'; aAnswers[25] = 1; calculate(); }
	if((el.id == "a25") && (trim(el.value).toLowerCase() != "leona lewis")){ document.c25.src='_graphics/cross.gif'; aAnswers[25] = 0; calculate(); }
	if((el.id == "s25") && (trim(el.value).toLowerCase() == "bleeding love") && (trim(document.getElementById('a25').value.toLowerCase()) == "leona lewis")){ document.c25.src='_graphics/tick.gif'; aAnswers[25] = 1; calculate(); }
	if((el.id == "s25") && (trim(el.value).toLowerCase() != "bleeding love")){ 	document.c25.src='_graphics/cross.gif'; aAnswers[25] = 0; calculate(); }

	if((el.id == "a26") && (trim(el.value).toLowerCase() == "keane") && (trim(document.getElementById('s26').value.toLowerCase()) == "spiralling")){ document.c26.src='_graphics/tick.gif'; aAnswers[26] = 1; calculate(); }
	if((el.id == "a26") && (trim(el.value).toLowerCase() != "keane")){ document.c26.src='_graphics/cross.gif'; aAnswers[26] = 0; calculate(); }
	if((el.id == "s26") && (trim(el.value).toLowerCase() == "spiralling") && (trim(document.getElementById('a26').value.toLowerCase()) == "keane")){ document.c26.src='_graphics/tick.gif'; aAnswers[26] = 1; calculate(); }
	if((el.id == "s26") && (trim(el.value).toLowerCase() != "spiralling")){ 	document.c26.src='_graphics/cross.gif'; aAnswers[26] = 0; calculate(); }
	
	if((el.id == "a27") && (trim(el.value).toLowerCase() == "katy perry") && (trim(document.getElementById('s27').value.toLowerCase()) == "i kissed a girl")){ document.c27.src='_graphics/tick.gif'; aAnswers[27] = 1; calculate(); }
	if((el.id == "a27") && (trim(el.value).toLowerCase() != "katy perry")){ document.c27.src='_graphics/cross.gif'; aAnswers[27] = 0; calculate(); }
	if((el.id == "s27") && (trim(el.value).toLowerCase() == "i kissed a girl") && (trim(document.getElementById('a27').value.toLowerCase()) == "katy perry")){ document.c27.src='_graphics/tick.gif'; aAnswers[27] = 1; calculate(); }
	if((el.id == "s27") && (trim(el.value).toLowerCase() != "i kissed a girl")){ 	document.c27.src='_graphics/cross.gif'; aAnswers[27] = 0; calculate(); }
	
	if((el.id == "a28") && (trim(el.value).toLowerCase() == "snow patrol") && (trim(document.getElementById('s28').value.toLowerCase()) == "run")){ document.c28.src='_graphics/tick.gif'; aAnswers[28] = 1; calculate(); }
	if((el.id == "a28") && (trim(el.value).toLowerCase() != "snow patrol")){ document.c28.src='_graphics/cross.gif'; aAnswers[28] = 0; calculate(); }
	if((el.id == "s28") && (trim(el.value).toLowerCase() == "run") && (trim(document.getElementById('a28').value.toLowerCase()) == "snow patrol")){ document.c28.src='_graphics/tick.gif'; aAnswers[28] = 1; calculate(); }
	if((el.id == "s28") && (trim(el.value).toLowerCase() != "run")){ 	document.c28.src='_graphics/cross.gif'; aAnswers[28] = 0; calculate(); }
	
	if((el.id == "a29") && (trim(el.value).toLowerCase() == "kaiser chiefs") && (trim(document.getElementById('s29').value.toLowerCase()) == "never miss a beat")){ document.c29.src='_graphics/tick.gif'; aAnswers[29] = 1; calculate(); }
	if((el.id == "a29") && (trim(el.value).toLowerCase() != "kaiser chiefs")){ document.c29.src='_graphics/cross.gif'; aAnswers[29] = 0; calculate(); }
	if((el.id == "s29") && (trim(el.value).toLowerCase() == "never miss a beat") && (trim(document.getElementById('a29').value.toLowerCase()) == "kaiser chiefs")){ document.c29.src='_graphics/tick.gif'; aAnswers[29] = 1; calculate(); }
	if((el.id == "s29") && (trim(el.value).toLowerCase() != "never miss a beat")){ 	document.c29.src='_graphics/cross.gif'; aAnswers[29] = 0; calculate(); }
	
	if((el.id == "a30") && (trim(el.value).toLowerCase() == "bon jovi") && (trim(document.getElementById('s30').value.toLowerCase()) == "livin on a prayer")){ document.c30.src='_graphics/tick.gif'; aAnswers[30] = 1; calculate(); }
	if((el.id == "a30") && (trim(el.value).toLowerCase() != "bon jovi")){ document.c30.src='_graphics/cross.gif'; aAnswers[30] = 0; calculate(); }
	if((el.id == "s30") && (trim(el.value).toLowerCase() == "livin on a prayer") && (trim(document.getElementById('a30').value.toLowerCase()) == "bon jovi")){ document.c30.src='_graphics/tick.gif'; aAnswers[30] = 1; calculate(); }
	if((el.id == "s30") && (trim(el.value).toLowerCase() != "livin on a prayer")){ 	document.c30.src='_graphics/cross.gif'; aAnswers[30] = 0; calculate(); }
	
}