javascript - enable/disable button with tinymce -

i want enable/disable button when there text in tinymce. when there enable button, when there isnt disable button. try this:

    tinymce.init({         // general options         mode: "specific_textareas",         editor_selector: "mceeditor"     });      $('#btngeneratepdfmailformsubmitter').attr('disabled', 'disabled')      tinymce.triggersave();     var hallo = $('#generatepdfmailformsubmitter').val();     if ($.trim(hallo.val) != '') {         alert(hallo);         $('#btngeneratepdfmailformsubmitter').removeattr('disabled');//  .attr("disabled", true);     }     else         alert(hallo);     $('#btngeneratepdfmailformsubmitter').attr('disabled', 'disabled'); //.attr("disabled", false); 

but button disabled.

thank you

like this:

$('#btngeneratepdfmailformsubmitter').attr('disabled', 'disabled')              tinymce.triggersave();             var hallo = $('#generatepdfmailformsubmitter').val();             if ($.trim(hallo.val) != "") {                 alert(hallo);                 $('#btngeneratepdfmailformsubmitter').removeattr('disabled');//  .attr("disabled", true);             } 

maybe, because @ end of script, disable button if($.trim(hallo.val) != '').

try removing last $('#btngeneratepdfmailformsubmitter').attr('disabled', 'disabled');