maskIframesOnResize=true bug work-around

[afromogli]

…ng jQuery Layout with option[maskIframesOnResize = true], resizing the pane, replacing the HTML-content in pane and then resizing it again. In that case "s" was undefined which lead to resize-crashes. This is only a work-around until the root problem is resolved, I think that it would be great with a "RefreshDOM()" method that refreshes tha pane-state that you would call after replacing the pane-content.