var inputTags = document.getElementsByTagName(‘input’);
var checkboxCount = 0;
length = inputTags.length;
for (var i=0; i<length; i++) {
if (inputTags[i].type == ‘checkbox’ && inputTags[i].checked) {
checkboxCount++;
}
}
if(checkboxCount<=0){
alert(‘Some messageg’);
return false;
}