<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>New document</title>
</head>
<body>
<style type="text/css">
.skryte {display: none}
.odkryte {
display: }
}
</style>
<script type="text/javascript">
function zmen_viditelnost() {
document.getElementById("zeli").style.display = "";
}
</script>
<form action="post.php">
<b>Jakou zeleninu máte nejraději?</b><br><br>
<input onclick="zmen_viditelnost();" type="radio" name="zelenina" value="zeli"> zelí<br><br>
<div id="zeli" style="display:none;">
napište prosím proč<br>
<textarea name="proczeli" id="zeli2" cols="40" rows="3">
</textarea>
</div>
</form>
</body>
</html>Případně přes třídy:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>New document</title>
</head>
<body>
<style type="text/css">
.skryte {display: none}
.odkryte {
display: }
}
</style>
<script type="text/javascript">
function zmen_viditelnost() {
document.getElementById("zeli").className = "odkryte";
}
</script>
<form action="post.php">
<b>Jakou zeleninu máte nejraději?</b><br><br>
<input onclick="zmen_viditelnost();" type="radio" name="zelenina" value="zeli"> zelí<br><br>
<div id="zeli" class="skryte">
napište prosím proč<br>
<textarea name="proczeli" id="zeli2" cols="40" rows="3">
</textarea>
</div>
</form>
</body>
</html>