The markup should be changed to add attributes idto each element selectto which you would like to add an event. This allows the code to recognize which selectevent handler should be attached to.
script. , select , . , show/hide, toggle, . , , , .
Javascript
$(document).ready(function () {
$('.form-div2, .form-div3, .form-div4, .form-div5').show();
$('.form-div42').hide();
$('#user-type').change(function () {
$('.form-div2, .form-div3').toggle($(this).val() == "option1");
});
$('#product').change(function () {
$('.form-div42').toggle($(this).val() == "option2");
});
});
HTML
<select id="user-type">
<option value="option1">I'm a first-time user</option>
<option value="option2">I would like to renew or upgrade</option>
</select>
<select id="product">
<option value="option1">Product1</option>
<option value="option2">Other</option>
</select>
JS Fiddle: http://jsfiddle.net/4EmE5/9/