<div style="float:left;"><select id="noh" onchange="sen();">
<option value="faal">فعال</option>
<option value="hazf">غیرفعال</option>
<option value="makhfi">مخفی</option>
</select>
</div>
<div id="perviewhazf"></div>
<script>
function sen(){
if(document.getElementById('noh').value=='makhfi'){
document.getElementById('perviewhazf').innerHTML='<div class="blockContent" scrolling="auto" frameborder="0" id="preview" contenteditable="true" name="preview" style="visibility: hidden;height: 400px;bottom: 0;width: 99%;overflow-x: hidden;overflow-y: auto;" onclick="navid52();navid53();" onkeydown="navid52();" onkeypress="navid52();" onkeyup="navid52();" onload="navid52();" onchange="navid52();></div>';
}
if(document.getElementById('noh').value=='faal'){
document.getElementById('perviewhazf').innerHTML='<div class="blockContent" scrolling="auto" frameborder="0" id="preview" contenteditable="true" name="preview" style="height: 400px;bottom: 0;width: 99%;overflow-x: hidden;overflow-y: auto;" onclick="navid52();navid53();" onkeydown="navid52();" onkeypress="navid52();" onkeyup="navid52();" onload="navid52();" onchange="navid52();></div>';
}
if(document.getElementById('noh').value=='hazf'){
document.getElementById('perviewhazf').innerHTML='<div class="blockContent" style="height: 400px;bottom: 0;width: 99%;overflow-x: hidden;overflow-y: auto;">بخش نمایش آنلاین حذف شد...</div>';
}
}
</script>