function f (){
var arry=document.getElementByClassName(“a”);
for ( var i = 0 ; i< arry. length;i++) {
arry[i].clicked= ! arry[i].clicked; } } }
function f (){
var arry=document.getElementByClassName(“a”);
for ( var i = 0 ; i< arry. length;i++) {
arry[i].clicked= ! arry[i].clicked; } } }