Javascript a textarea – JavaScript, AJAX, jQuery – Fórum – Programujte.com

Dobrý den. Mám tuto JS funkci

function simple_tag(tag_name,textarea) {

     try {

         textarea = document.getElementById(textarea);

         var pretext = textarea.value.substring(0, textarea.selectionStart);

         var posttext = textarea.value.substring(textarea.selectionEnd,

textarea.value.length);

         var selection =

textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);

         textarea.value = pretext + '<' + tag_name + '>' + selection + '</' + tag_name + '>' + posttext;

         textarea.focus();

     }

     catch(exception) {

         alert(exception.message);

     }

}

-->

</script>

echo "<button onclick=\"simple_tag('b',$textarea);return false;\">aaa</button>";