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dhtmlxGrid addRow trigger onBeforeUnload in IE7

Hi, I capture onBeforeUnload semi-event on my application to warning the user to prevent data loss.

    window.onbeforeunload = function() {
                if (myModifiedData())
                {
                    return "Data will lost. Are you sure?";
                }
        
when I press a button that add a row in a dhtmlXGrid

myGrid.addRow(recuperaUniqueID('nou-'), '---'');

the onBeforeUnload event is tiggered in IE 7, in Firefox run as expected.

Any suggestion?

Kind Regards
Àlex Corretgé

Most probably you are using link similar to next , to add new row
      <a href="javascript:some_action()">add row </a>
IE trigger onBeforeUnload event for each click on link, without relation is link navigates outside of script, or contains just a javascript command. 
To resolve problem you can change link to next syntax
      <a href="#" onclick="some_action()">add row </a>