function int_js() {
	for (var i=1;i<=15;i++)
		hideAnswer('a'+i);
}


function hideAnswer(answer) { 
	var ans = document.getElementById(answer)
	if (ans) {
		ans.style.display = 'none'; 
	}
} 

			
function showAnswer(answer) {
	int_js()
	var ans = document.getElementById(answer)
	if (ans) {
		ans.style.display = 'block'; 
	} 
} 

function handon(mm) {
	mm.style.cursor = 'hand';
}