Hi. Thanks for that, but it doesn't seem to work either. Also, note that the problem doesn't appear to be the this.startColumnDrag() function. As replacing this with alert('something') doesn't work either. With: <pre>dragColumns[i].firstChild.firstChild.addEventListener("onmousedown",alert('something');</pre> the alert appears when the page loads, but not when I click on column dividers in the header. With: <pre>dragColumns[i].firstChild.firstChild.addEventListener( "onmousedown", function() { alert('something')} , false); </pre> nothing happens at all. In both cases there are no error messages. <p>Hi. Thanks for that, but it doesn't seem to work either. Also, note that the problem doesn't appear to be the this.startColumnDrag() function. As replacing this with alert('something') doesn't work either. With: <br /><pre>dragColumns[i].firstChild.firstChild.addEventListener("onmousedown",alert('something');</pre> <br />the alert appears when the page loads, but not when I click on column dividers in the header. With: <br /><pre>dragColumns[i].firstChild.firstChild.addEventListener( "onmousedown", function() { alert('something')} , false); </pre> <br />nothing happens at all. In both cases there are no error messages.</p> 2008-05-15T20:26:26Z 2 Forum 9174 2363 2008-05-15T20:26:26Z 52923