ok i have this:

<p id="q1Alt_a" class="alternativa">a) Their (linha 02):
<select id="questao1_a">
<option selected="selected" value="0">Selecione uma opcao</option>
<option value="1">to know what other people are like</option>
<option value="2">the reader / any reader</option>
<option value="3">a person (meaning all the people)</option>
<option value="4">prospective employees</option>
<option value="5">Jennifer Goelbeck/Goelbeck</option>
</select> <img class="simbolo" id="q1SimbCerto_a" src="correto.png" /><img class="simbolo" id="q1SimbErrado_a" src="errado.png" /> </p>

and i need an function that does something like " if option 1 selected then something happens (i got the rest covered)"
i just dont know how to do the if option x selected.

i tried lots of things but none work

function selecionaHigh(){


if(document.getElementById('questao1_e').selectedIndex == 2){