JSFiddle - React, Tailwind, and code Playground
by inugard
HTML
<script src="http://nesnelileti.site90.com/jsfiddle/jquery.chained.min.js"></script>
<form>
<select data-placeholder="Branşlar" name="brans" id="brans" style="width:180px;">
<option value="hekim/bostab.html">-Branşlar-</option>
<option value="goz" class="1">*Bunu seç*</option>
<option value="tababet" class="1">Genel Tababet</option>
<option value="anest" class="1">Anestezi ve Reanimasyon</option>
</select>
<br />
<br />
<select data-placeholder="Tıbbi Birimler" name="birim" id="birim" style="width:180px;">
<option value="" selected="selected">-Birimler-</option>
<option value="glokom" class="goz 2">*Bunu seç*</option>
<option value="katarakt" class="goz 2">Karatakt</option>
<option value="kornea" class="goz 2">Kornea ve Kontak Lens</option>
<option value="okulo" class="goz 2">Oküloplastik</option>
<option value="refraktif" class="goz 2">Refraktif Cerrahi</option>
<option value="retina" class="goz 2">Retina</option>
<option value="sasilik" class="goz 2">Şaşılık ve Çocuk Göz Sağlığı</option>
<option value="oftal" class="goz 2">Genel Oftalmoloji</option>
<option value="anest" class="anest 2">Anestezi ve Reanimasyon</option>
<option value="tababet" class="tababet 2">Genel Tababet</option>
</select>
<br />
<br />
<select data-placeholder="Hekimler" name="hekim" id="hekim" style="width:180px;" onchange="getiriframe()">
<option value="">-Hekimler-</option>
<option value="http://www.google.com.tr" class="glokom refraktif katarakt">DR1-Bunu seç</option>
<option value="hekim/hekim02.html" class="glokom refraktif kornea">DR2</option>
<option value="hekim/hekim05.html" class="refraktif katarakt kornea">DR3</option>
<option value="hekim/hekim07.html" class="retina">DR4</option>
<option value="hekim/hekim06.html" class="okulo sasilik">DR5</option>
<option...
JavaScript
$(function () {
/* For jquery.chained.js */
$("#birim").chained("#brans");
$("#hekim").chained("#birim");
/* Show button after each pulldown has a value. */
$("#hekim").bind("change", function (event) {
if ("" != $("option:selected", this).val() && "" != $("option:selected", $("#birim")).val()) {
$("#button").fadeIn();
} else {
$("#button").hide();
}
});
$("#c").chained("#a,#b");
});
<!---->
function getiriframe() {
var theSelect = document.getElementById('hekim');
var theIframe = document.getElementById('hekimtab');
var theUrl;
theUrl = theSelect.options[theSelect.selectedIndex].value;
theIframe.src = theUrl;
}