function showHideAnswer(){
var numericID = this.id.replace(/[^\d]/g,'');
var obj = document.getElementById('a' + numericID);
if(obj.style.display=='block'){
obj.style.display='none';
}else{
obj.style.display='block';
};
};
function initShowHideContent(){
var divs = document.getElementsByTagName('DIV');
for(var no=0;no<divs.length;no++){
if(divs[no].className=='question'){
divs[no].onclick = showHideAnswer;
};
};
};
window.onload = initShowHideContent;