What is the best UI widget to use in Spring Web Flow Project, Dojo (dijit) etc??

Working on Spring Project but having issue using Dojo (dijit) does anyone know anything better! I would like to hear comments from other programmers on whtat UI widgets have been used in projects and is easy to work with. I am going to be building screens like the one below.. You can see I need my fields hightlighted as the user clicks on them, tool tips and error messages. Please let me know what you used, use and like... thanks!

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