noBubble.js

//Put on a text area in java
String action = "'return Event.noBubble( event, RSACommon.limitLength( this, " + maxLength + " ) )'";
javascript = " onkeypress=" + action + 
                          " onkeyup=" + action + 
                          " onkeydown=" + action + 

//RSACommon
limitLength: function( elem, maxLength ) {
        if( elem.value.length > maxLength ) {
            elem.value = elem.value.substring( 0, maxLength );
            return false;
        }
        return true;
    }

//
Event.noBubble = function( event, returnCode ) {
    event = event || window.event;

    event.cancelBubble = true;
    if(event.stopPropagation) {
      event.stopPropagation();
    }
    return returnCode;
}