[Sweet]

<style>
#but1 {
  display: none;
}
</style>

<p id="but1"><a class="myButton1">Выбрать</a></p>
<p id="but2"><a onClick="q2();" class="myButton2">Выбрать</a></p>

<script>

function q2() { 
    document.getElementById("but1").style.display = 'block';
    return false; 
}

</script>