It's possible.

 

Please use the following code as an example:

 

 function CE_attachEvent()
   {
    // get the cute editor instance
    var editor1 = document.getElementById('<%=Editor1.ClientID%>');
    var images=editor1.all.tags("IMG");
    var len=images.length;
    for(var i=0;i<len;i++)
    {
     var img=images[ i ];
     if(img.Command=="TabCode")
     if(img.attachEvent)
      img.attachEvent('onclick',HandleChange);
    }
   }   
   ;" if(img.Command='="TabCode")'>

 

function HandleChange()
   {
    // get the cute editor instance
    var editor1 = document.getElementById('<%=Editor1.ClientID%>');
    //Get the editor content 
    var editdoc=editor1.GetDocument();
    alert(editdoc.body.innerHTML);
   } 

 

 <INPUT type=button value="attach Event (onkeypress)" onclick="CE_attachEvent()">