function gradeQuizz(gender) {
	var score=0, i, j, a
	if (gender=="none"){ alert("Please select a gender before grading your quiz."); return false; }
	//reset CSS styles
	var spans = document.getElementsByTagName("span")
	for (a=0; a < spans.length; a++) {
		spans.item(a).style["display"] = "none"
	}
		
	//loop through all 10 questions tabulating score
	for (i=1; i<11; i++) {
		currentQ = "Q"+i
		//alert(currentQ)
		//loop through each choice to see which is checked
		for (j=0; j<5; j++) {
		//alert(j)
			if( document.getElementById("quizz")[currentQ][j].checked ) {
				score = score + parseFloat(document.getElementById("quizz")[currentQ][j].value)
			}
		}
	}
	document.getElementById("score").value = score
	document.getElementById("results").style["display"] = "inline";
	
	if (gender=="male") {
		if(score <= 10) {
			document.getElementById("normal").style["display"] = "inline";
		}
		else if(score <= 20) {
			document.getElementById("possible").style["display"] = "inline";
		}
		else if(score > 20) {
			document.getElementById("likely").style["display"] = "inline";
		}
	}
	else if (gender=="female") {
		if(score <= 5) {
			document.getElementById("normal").style["display"] = "inline";
		}
		else if(score <= 10) {
			document.getElementById("possible").style["display"] = "inline";
		}
		else if(score > 10) {
			document.getElementById("likely").style["display"] = "inline";
		}
	}
}