I'm trying to test the following code to copy a value from textfield source to the textfield destination,but the property onChangeTopics  doesn't work well, whenever i write something in the source textfield his value is not submited, any help plz??

1. <s:form id="test">
2. <label for="sourceString">Enter string: </label>
3. <s:url id="urlsimpleecho" value="texfieldDestination.action"><s:param name="sourceString"/></s:url>
4.     <sj:textfield onChangeTopics="textfieldUpdated" href="%{urlsimpleecho}" id="sourceString" name="sourceString"/>
5. 
   
6. <label for="destString">copy of string: </label>
7.         <s:url id="urlsimpleecho" action="texfieldDestination.action"><s:param name="destString">remote content for textfield!</s:param></s:url>
8.         <sj:textfield  reloadTopics="textfieldUpdated" href="%{urlsimpleecho}" formIds="test" id="destString" name="destString" loadingText="Loading content of textfield ..."/>
9. </s:form>