<input type="radio" checked name="dva" id="dva1"/>
<label for="dva1"><img src="/upload/s1p1.png"></label>
<input type="radio" checked name="dva" id="dva1"/>
<label for="dva1"><img src="/upload/s1p1.png" class="notChecked"><img src="/upload/s1p2.png" class="ifChecked"></label>
<style>
input:checked + label img.ifChecked{
display: block;
}
input:checked + label img.notChecked{
display: none;
}
input + label img.ifChecked{
display: none;
}
input + label img.notChecked{
display: block;
}
</style>