txt = (olNs4) ? '<div id="backdrop"></div>' : ((olIe55 && olHideForm) ? bckDropSrc(wd + X, ht + Y, zIdx++) : '') + '<div id="backdrop" style="position: absolute;' + posStr[0] + '; width: ' + wd + 'px; z-index: ' + (zIdx++) + '; ';