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<div class="vt"><input type="radio" name="v" id="v1" checked><label for="v1">Overview</label><input type="radio" name="v" id="v2"><label for="v2">Specs</label><input type="radio" name="v" id="v3"><label for="v3">Reviews</label><div class="pn n1">A short summary of the product.</div><div class="pn n2">Weight, size and materials.</div><div class="pn n3">What people are saying.</div></div>About this navigation bar
Vertical Radio Tabs is a pure CSS navigation bar made with HTML and CSS only, by @admin. Open an example, copy the HTML and the CSS, and paste them into your page. There is nothing to install and no JavaScript to load.