PdfViewer support ie 8 and other browser
use 2 ways to implement pdfviewer in paticular.
use pdf.js to support mainly browsers ,simultanesously use another way to make IE 9 and below could be compatible.
the plugins we used including openOffice (to turn doc/xls/ppt into pdf), flexpaper(to display swf ), swftools(to turn pdf into swf)
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