Validate a Radio Button - html

Question

I want to make a simple validation form, which will show warning message, when it will be uncheck in a <div>.
This is what, i come up till now.
<form action="result.php" method="post">
<b>1st question:</b><br />
Option 1 <input type="radio" name="question1" value="Option1" /><br />
Option 2 <input type="radio" name="question1" value="Option2" /><br />
Option 3 <input type="radio" name="question1" value="Option3" /><br />
Option 4 <input type="radio" name="question1" value="Option4" /><br />
<br />
<b>2nd question:</b><br />
Option 1 <input type="radio" name="question2" value="Option1" /><br />
Option 2 <input type="radio" name="question2" value="Option2" /><br />
Option 3 <input type="radio" name="question2" value="Option3" /><br />
Option 4 <input type="radio" name="question2" value="Option4" /><br />
<br />
<input type="submit" value="submit" />
</form>`

Answer 1

you can do this by jQuery. The length attribute it calculate The number of elements in the jQuery object
$("#forms").submit(function(){ //or you can use click event
if ($("input[name='question1']:checked").length > 0){
$('.show_message').html(' ');
$('.show_message').html('selected ');
}
else{
$('.show_message').html(' ');
$('.show_message').html(' no one selected ');
return false;
}
});
and
<div class="show_message"></div>
<form id="form" action="result.php" method="post">
. . . .
</form>