javascript - this.parentNode returns undefined when run using Firefox -

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when following code run via firefox , click x button, javascript returns tmpfield undefined. need parentnode of button div.

<head>     <title></title>     <script type ="text/javascript">         function removeitem() {                 if (document.addeventlistener) {                     var container = document.getelementbyid("inputcontainer");                     var tmpfield = this.parentnode;                     alert("field: " + tmpfield);                                  }         }     </script> </head> <body> <table width="100%"> <tr>     <td style="width: 10%; vertical-align:top;">field:</td>     <td id="inputcontainer">         <div id="divinput1" style="display: inline;">             <input id="txtcomment1" name="txtcomment" type="text" maxlength="35" />             <input id="btndelete1" value="x" type="button" name="btndelete" onclick="removeitem()" />         </div>     </td> </tr> </table> </body> </html>

in scenario, dynamically create multiple divs within "inputcontainer". each of divs has same structure containing text box , delete button (with ids containing next increment). important me able return parentnode of button div. have code work in ie not firefox. ideas how resolve?

thanks...

use html:

<input id="btndelete1" value="x" type="button" name="btndelete" onclick="removeitem(this)" />

and js:

function removeitem(button) {     var container = document.getelementbyid("inputcontainer");     var tmpfield = button.parentnode;     alert("field: " + tmpfield); }

demo: http://jsfiddle.net/jwpds/1/

the context of removeitem function call global, this refers window. specific element clicked, need pass this in function call, , access parameter in function.

and have no idea why checking document.addeventlistener, can assure you, don't need doing.


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