Looks for the previous occurance of the current search text.

def findPrev( self ):
        """
        Looks for the previous occurance of the current search text.
        """
        text = self.uiFindTXT.text()
        view = self.currentWebView()
        
        options =  QWebPage.FindWrapsAroundDocument
        options |= QWebPage.FindBackward
        
        if ( self.uiCaseSensitiveCHK.isChecked() ):
            options |= QWebPage.FindCaseSensitively
        
        view.page().findText(text, options)