Update for SPEasyForms on Content Type
HTML
<tr>
<td nowrap="true" valign="top" class="ms-formlabel">Content Type</td>
<td valign="top" class="ms-formbody">
<select name="ctl00$m$g_0e64794f_fe11_4b8b_abe4_7822211d2924$ctl00$ctl03$ctl00$ContentTypeChoice" id="ctl00_m_g_0e64794f_fe11_4b8b_abe4_7822211d2924_ctl00_ctl03_ctl00_ContentTypeChoice" title="Content Type" onchange="javascript:ChangeContentType("ctl00_m_g_0e64794f_fe11_4b8b_abe4_7822211d2924_ctl00_ctl03_ctl00_ContentTypeChoice");return false;">
<option value="0x01000DC83A43747B1D4EA7B82A01740FC9B80048420595A1033C4EAC37A94D1AAFC95A">Comm Request</option>
<option value="0x01000DC83A43747B1D4EA7B82A01740FC9B8010036AA6ED244D88F42BDC2DD39D7D9DBCF">Comm Request Approval</option>
<option selected="selected" value="0x01000DC83A43747B1D4EA7B82A01740FC9B80101002970EC4914DF30458DD47D8722665DE3">Comm Request Confirmation</option>
</select>
<br/> <span id="ctl00_m_g_0e64794f_fe11_4b8b_abe4_7822211d2924_ctl00_ctl03_ctl00_ContentTypeDescription"></span>
</td>
</tr>
<div class="formSection" id="dispoSection">Disposition</div>
<div class="formSection" id="confirmSection">Send Confirmation</div>
JavaScript
var contentType = jQuery("select[title='Content Type']");
if ($(contentType).val() === '0x01000DC83A43747B1D4EA7B82A01740FC9B80048420595A1033C4EAC37A94D1AAFC95A') {
$('#dispoSection').hide();
$('#confirmSection').hide();
} else if ($(contentType).val() ==='0x01000DC83A43747B1D4EA7B82A01740FC9B8010036AA6ED244D88F42BDC2DD39D7D9DBCF') {
$('#confirmSection').hide();
} else {
};