HTML - Cannot Validate

<embed src="ozpower.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="687" height="335"></embed>

    
    window.onload = init;

    function init() {
        var el = document.getElementById("welcome_message");
        var username=getCookie('username');
        
        document.getElementById("my_form").onsubmit = parse_form;
        el.innerHTML = "<p class=\"welcome\">Welcome to the football quiz " + username + "</p>";
    }

    function parse_form() {
        var visitor_name = document.getElementById("visitor_name").value;
        var el = document.getElementById("welcome_message");
  
        if (visitor_name || (username!=null && username!="")) {
            el.innerHTML = "<p class=\"welcome\">Welcome to the football quiz " + visitor_name + "</p>";
            setCookie('username',visitor_name,365);
        }
        return false;
    }
    
    function getCookie(c_name) {
        if (document.cookie.length>0) {
            c_start=document.cookie.indexOf(c_name + "=");
            
            if (c_start!=-1) {
                c_start=c_start + c_name.length+1;
                c_end=document.cookie.indexOf(";",c_start);
                
                if (c_end==-1) c_end=document.cookie.length;
            return unescape(document.cookie.substring(c_start,c_end));
            }
        }
    return "";
    }

    function setCookie(c_name,value,expiredays) {
        var exdate=new Date();
        exdate.setDate(exdate.getDate()+expiredays);
        document.cookie=c_name+ "=" +escape(value)+
        ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
    }
    
    // -------------------end name----------------------



    //
    function quiz_message() {
    
    document.getElementById("results").innerHTML = "Complete the quiz and your scores will appear here!....";
    }
    //
    
    var ans = new Array;
var done = new Array;
var yourAns = new Array;
var explainAnswer = new Array;

var score = 0;
ans[1] = "b";
ans[2] = "b";
ans[3] = "a";
ans[4] = "c";
ans[5] = "b";



explainAnswer[1]="Roar is Blackburn's mascot<br/><br/>";
explainAnswer[2]="John Coleman is Accrington's manager<br/><br/>";
explainAnswer[3]="The picture was infact David Beckham<br/><br/>";
explainAnswer[4]="The golden oldie Ryan Giggs was PFA Player of the year<br/><br/>";
explainAnswer[5]="The top scorer was Thiery Henry<br/>";

function Engine(question, answer) {
yourAns[question]=answer;
}

function Score(){
var answerText = "How did you do?<br/>\n------------------------------------------------------------------------\n<br/>";
for(i=1;i<=5;i++){
   answerText=answerText+"\nQuestion :"+i+"\n";
  if(ans[i]!=yourAns[i]){
    answerText=answerText+"\n<img src=\"images/wrong.jpg\" />The correct answer was " +ans[i] + "\n"+explainAnswer[i]+"\n";
  }
  else{
    answerText=answerText+" \n<img src=\"images/right.jpg\" />Correct!<br/> \n";
    score++;
  }
}

answerText=answerText+"\nYour total score is : <a class=\"score\">"+score+"</a>\n";

var username=getCookie('username');

//now score the user
if(score<=0){
answerText=answerText+"You need to learn some more " +username+ ".";
}
if(score>=1 && score <=1){
answerText=answerText+"My grandma could do better than that " +username+ "!";
}
if(score>=2 && score <=2){
answerText=answerText+"Bit more practice needed " +username+ ".";
}
if(score>=3 && score <=3){
answerText=answerText+"Neither bad or birlliant. Good effort " +username+ ".";
}
if(score>=4 && score <=4){
answerText=answerText+"4/5 aint bad " +username+ "!";
}
if(score>4){
answerText=answerText+"You are a footballing expert " +username+ "!!";
}

document.getElementById("results").innerHTML = answerText;

}


function Score_female(){
var answerText = "<h5>How did you do?<br/>\n------------------------------------------------------------------------\n<br/>";
for(i=1;i<=5;i++){
   answerText=answerText+"\nQuestion :"+i+"\n";
  if(ans[i]!=yourAns[i]){
    answerText=answerText+"\n<img src=\"images/wrong.jpg\" />The correct answer was " +ans[i] + "\n"+explainAnswer[i]+"\n";
  }
  else{
    answerText=answerText+" \n<img src=\"images/right.jpg\" />Correct!<br/> \n";
    score++;
  }
}

answerText=answerText+"\nYour total score is : <a class=\"score\">"+score+"</a>\n";

var username=getCookie('username');

//now score the user
if(score<=0){
answerText=answerText+"You need to learn some more " +username+ ".</h5>";
}
if(score>=1 && score <=1){
answerText=answerText+"My grandma could do better than that " +username+ "!</h5>";
}
if(score>=2 && score <=2){
answerText=answerText+"Bit more practice needed " +username+ ".";
}
if(score>=3 && score <=3){
answerText=answerText+"Neither bad or birlliant. Good effort " +username+ ".</h5>";
}
if(score>=4 && score <=4){
answerText=answerText+"4/5 aint bad " +username+ "!</h5>";
}
if(score>4){
answerText=answerText+"You are a footballing expert " +username+ "!!</h5>";
}

document.getElementById("results").innerHTML = answerText;

}









function changeDivImageFemale()
    {
        var imgPath = new String();
        imgPath = document.getElementById("quiz_box").style.backgroundImage;
        
        if(imgPath == "url(images/boy.jpg)" || imgPath == "")
        {
            document.getElementById("quiz_box").style.backgroundImage = "url(images/girl.jpg)";
        }
        
    }
    
function changeDivImageMale()
    {
        var imgPath = new String();
        imgPath = document.getElementById("quiz_box").style.backgroundImage;
        
        if(imgPath == "url(images/girl.jpg)" || imgPath == "")
        {
            document.getElementById("quiz_box").style.backgroundImage = "url(images/boy.jpg)";
        }
        
    }
    
    
    
    
    
    
   
    
    function changeDivImage(url) {
    document.getElementById("third_col").style.backgroundImage = "url('images/" + url + "')";
}



//radio button links
function go(loc) {
window.location.href = loc;
}
/////

function quiz_alert() {
alert ("Thank you. You're questions will be change accordingly.");
}

<SCRIPT LANGUAGE="JavaScript" type="text/javascript" src="javascript/javascript.js"></script>
<link rel="stylesheet" href="style.css" type="text/css" />


</head>

    <body>
        <div id="full_page_wrap">
               
                <div id="main_wrap">
               
                
    <div id="header">
      
    </div>
            

                
                <div id="first_col">
				<ul id="menu">
				<li><a href="index.htm">Home</a></li>
				<li><a href="quiz.htm">Take the quiz</a></li>
				<li><a href="links.htm">Links</a></li>
		
				</ul>
				
</div>

<div id="second_col">


            

                <h1><div id="welcome_message"></div></h1>
                <hr/>
                   <form id="my_form" action="#" name="my_form" ">
                        <p>Please enter your name:</p>
                        <input type="text" name="visitor_name" id="visitor_name" />
                        <input type="submit" value="Submit"  onsubmit="return" />
                    </form>
                    <p>Your favourite football team: 
                    
                    <form action="">
                <select onchange="changeDivImage(this.value)">
               <option>Choose your favourite team</option>
                <option value="arsenal.png">Arsenal</option>
                <option value="aston_villa.png">Aston Villa</option>
                <option value="birmingham_city.png">Birmingham City</option>
                <option value="blackburn_rovers.png">Blackburn Rovers</option>
                <option value="bolton_wanderers.png">Bolton Wanderers</option>
               <option value="burnley.png">Burnley</option>
                <option value="chelsea.png">Chelsea</option>
                <option value="everton.png">Everton</option>
                <option value="fulham.png">Fulham</option>
                <option value="hull.png">Hull City</option>
                <option value="liverpool.png">Liverpool</option>
               <option value="manchester_city.png">Manchester City</option>
                <option value="manchester_united.png">Manchester United</option>
                <option value="portsmouth.png">Portsmouth</option>
                <option value="stoke_city.png">Stoke City</option>
                <option value="sunderland.png">Sunderland</option>
                <option value="tottenham_hotspur.png">Tottenham Hotspur</option>
               <option value="west_ham.png">West Ham</option>
                <option value="wigan_athletic.png">Wigan Athletic</option>
                <option value="wolverhampton_wanderers.png">Wolverhampton Wanderers</option>
                    </select>
                    </form>
                    
                    
                    
                    <p>Please chhose your gender: </p>
                    <input type="radio" name="gender" value="Male"/> Male
                  <input type="radio" name="gender" value="Female" onClick="go('female.htm'); quiz_alert()"> Female
                    <center>
               
                
                
                
                


                </div>
                
                
                
<div id="third_col">
       
      <div id="results"></div>
	  </div>




        
        </div>
    </div>
    </body>
</html>