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Tabbar problem

Hello,

We are having strange problem with a tabbar. The Tabbar sits in a dhxWindow and each tab has an accordion attached.

The problem occurs intermittently when moving the mouse around the window. The Ie7 and IE8 error is Object Required. The problem does not occur in Firefox?

Using debugging tools it appears this is the code causing the error.

dhtmlXTabBar.prototype._getTabTarget=function(t)
{
    
    while((!t.className)||(t.className.indexOf("dhx_tab_element")==-1))
    {
        if((t.className)&&(t.className.indexOf("dhx_tabbar_zone")!=-1))
        return null;
        t=t.parentNode;
        if(!t)
        return null;
    };
    

return t};

specifically this line

while((!t.className)||(t.className.indexOf("dhx_tab_element")==-1))

This is not breaking anything or causing any problems but gives an unsightly error in the status bat which looks bad.

Have you got any odeas what could be causing this?

Many thanks
Scott Bailey