6Waddel,C.D.the Growing Digital Divide in Access for People with Disabilities:Overcoming Barriers to Participation in the Digital Economy[EB/OL].http://www.icdri.org/the_digital_ divide.htm.2005 -4-22.
7Neil Witt & Anne McDermott.Web Site Accessibility:What Logo will We Use Today? British Journal of Educational Technology,No.1,2004.45-55.