add: Element.show(cancelCurrentTaskPlaceholderEl); } 
context: function updateCurrentTask(taskEl){    var taskID = -1;    if (taskEl)        taskID = taskEl.getAttribute('id');    if (taskID != currentTaskID)    {        currentTaskID = taskID;        var topDocument = frames["topF"].document;                var currentTaskTdEl = topDocument.getElementById("currentTaskTd");        if (taskID == -1)        {            if (! pollWhenIdle)                clearPollInterval();            Element.hide(currentTaskTdEl);        }        else        {            var currentTaskTxtEl = topDocument.getElementById("currentTaskText").firstChild;            currentTaskTxtEl.replaceData(0, currentTaskTxtEl.length, taskEl.firstChild.data);            var cancelCurrentTaskEl = topDocument.getElementById("cancelCurrentTask");            if (taskEl.getAttribute("cancellable") == "1")                Element.show(cancelCurrentTaskEl);            else                Element.hide(cancelCurrentTaskEl);            Element.show(currentTaskTdEl);            if (! pollWhenIdle) // will be started by getConfigCallback() (auth.js) otherwise                startPollInterval();        }    }}
meta: 7608	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7608/b43b2f767afb8ab869cea6b88c1672eb8500569a/tasks.js/buggy/web/js/tasks.js