Via Willem Odendaal I opend the following web site http://www.squarefree.com/bookmarklets/forms.html#frmget. It holds an interesting collection of bookmarklets (Javascript commands that can be saved as bookmarks so they can be applied to every page that is opend in your browser).

For example: “remove MaxLength” … shows how important it is to use ASP.NET Validation Controls in your Web Applications.