function showGrade(whichGrade) {
	for (i=1;i<=6;i++) {
		document.getElementById('grade' + i).style.display = 'none';
		
		if (document.getElementById(whichGrade).style.display == 'none') {
			document.getElementById(whichGrade).style.display = 'block';
		} else {
			document.getElementById('grade' + i).style.display = 'none';
		}
		
		//alert (whichGrade);
			
	}
	
/*
	//document.getElementById(whichGrade).style.display = 'block';
	document.getElementById(whichGrade + 'Sel').selectedIndex = 0;
	grade = whichGrade.substr(5,1);
	toggleID('g' + grade + 'Topic1');
	*/
}


function toggleID(whichID) {
	for (i=1;i<=6;i++) {
		for (j=1;j<=6;j++) {
			document.getElementById('g' + i + 'Topic' + j).style.display = 'none';
			
			if (document.getElementById(whichID).style.display == 'none') {
				document.getElementById(whichID).style.display = 'block';
			} else {
				document.getElementById('g' + i + 'Topic' + j).style.display = 'none';
			}
		}
	}
	/*
	for (b=1;b<=6;i++) {
		document.getElementById('grade' + b).style.display = 'none';
		
		if (document.getElementById(whichGrade).style.display == 'none') {
			document.getElementById(whichGrade).style.display = 'block';
		} else {
			document.getElementById('grade' + b).style.display = 'none';
		}
	}	*/
}