The disadvantages of AJAX are: Search engines would not be able to index an AJAX application. The server information can not be accessed within AJAX. AJAX is not well integrated with any browser. ActiveX requests are enabled only in IE 5 and IE6 Data of all requests is URL-encoded, which increases the size of the request.
You have said that,"ActiveX requests are enabled only in IE 5 and IE6"...If some plugins are not found in a web application,now a days, all the browsers are requesting to install the plugins...Is plugins are made of ActiveX controls???
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Points:395