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[hackjose]

algo facil seria usar el elemento details, el titulo debe ir con summary

Código HTML:

<button onclick="desgloza()">Click</button>
 
<details id="uno">
<summary>Click me!</summary>
<p>anything</p>
</details>
 
<details id="dos">
<summary>Click me!</summary>
<p>anything</p>
</details>
 
<details id="tres">
<summary>Click me!</summary>
<p>anything</p>
</details>
    
​<script>
function desgloza()
    {
    var uno = document.getElementById("uno").open = true;
    var dos = document.getElementById("dos").open = true;
    var tre = document.getElementById("tres").open = true;
    }    
</script>​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
 

Saludos