Pyrazolopyrimidines of the formulain whichR1, R2, R3, R4, R5 and X are as defined in the description,processes for preparing these compounds and their use for controlling unwanted microorganisms. In the forward link device, four encoders encode input data of corresponding rates with a 13 coding rate, respectively. The web browser then submits an identifier of the web site, a version of the web site, an identifier of the web page edited, an identifier of an editable feature, and indicia of a new selection for the identified editable feature.