HTMLEditor Control Raise any Client-Side Events

The HTML Editor has three modes: Design, HTML Text, and Preview mode.
The design mode is in an IFrame. HTML Text is presented in a TextArea and the preview mode is in another Iframe. The code rendered about these three modes is as below:
  1. <iframe id="editor1_ctl02_ctl00" name="editor1_ctl02_ctl00" marginheight="0" marginwidth="0" frameborder="0" src="javascript:false;" style="height:100%;width:100%;display:none;border-width:0px;">
  2. /iframe>
  1. <textarea id="editor1_ctl02_ctl01" class="ajax__htmleditor_htmlpanel_default" style="height:100%;width:100%;display:none;">
  2. /textarea>
  1. <iframe id="editor1_ctl02_ctl02" name="editor1_ctl02_ctl02" marginheight="0" marginwidth="0" frameborder="0" src="javascript:false;" style="height:100%;width:100%;display:none;border-width:0px;">
  2. /iframe>
In the design mode, we can use the following JavaScript to append a callback function in onKeypress event.
  1. < script type = "text/javascript" >
  2. var count = 0;
  3. function pageLoad() {
  4. $get('editor1_ctl02_ctl00').contentWindow.document.body.onkeypress = function() {
  5. count++;
  6. $get('cc').innerHTML = "you input " + count + "charactors";
  7. };
  8. }
  9. /script>
In the same way, you can append another keypress event on the TextArea and preview IFrame.