Merhaba arkadaşlar aşağıda kod'larını vermiş olduğum form'da mail bölümüne girilmiş olan mail adresinin kullanılıp kullanılmadığını anında kontrol edilmesini istiyorum. Eğer mail adresi geçerli olmayan yani kullanılmıyan bir mail adresi ise "gönder" butonu çalışmasın ve " lütfen kullanılan mail adresi giriniz" şeklinde ikaz versin istiyorum. Bu konuda yardım lütfen.
</table>
</div>
<div id="colorlib-testimony" class="colorlib-light-grey">
<div class="container">
<div class="row">
</table>
<form action="https://formspree.io/xoqewjwp" method="POST">
<a href="images/bayilik5.pdf">
<button class="readmore" type="button" onClick="location.href='images/bayilik5.pdf'">Bayilik Şartnamesi</button>
</a>
<table style="width:100%">
<caption>Bayilik Şartnamesi, Lütfen Okuyunuz</caption>
<table style="width:100%">
<caption>BAYİLİK BAŞVURU FORMU</caption>
<tr>
<td><label for="adsoyad">Ad, Soyad:</label></td>
<td><input type="text" name="adsoyad" id="adsoyad" style="height:90px; width:400px" required/></td>
</tr>
<tr>
<td><label for="eposta">E-Posta:</label></td>
<td><input type="text" name="eposta" id="_repleyto" style="height:90px; width:400px" required/></td>
</tr>
<tr>
<td><label for="telefon">Telefon:</label></td>
<td><input type="text" name="telefon" id="telefon" style="height:90px; width:400px" required/></td>
</tr>
<tr>
<td><label for="konu">Adres:</label></td>
<td><input type="text" name="konu" id="konu" style="height:90px; width:400px" required/></td>
</tr>
<tr>
<td><label>Pozisyon:</label></td>
<td>
<input type="radio" name="Lisans Tip" value="Bayilik"> Bayilik
<input type="radio" name="Lisans Tip" value="Satış Temsilcisi"> Satış Temsilcisi
</td>
</tr>
<tr>
<td><label>Şehir Seçiniz:</label></td>
<td>
<select name="Sehir">
<option value="0">------</option>
<option value="1">Adana</option>
<option value="2">Adıyaman</option>
<option value="3">Afyonkarahisar</option>
<option value="4">Ağrı</option>
<option value="5">Amasya</option>
<option value="6">Ankara</option>
<option value="7">Antalya</option>
<option value="8">Artvin</option>
<option value="9">Aydın</option>
<option value="10">Balıkesir</option>
<option value="11">Bilecik</option>
<option value="12">Bingöl</option>
<option value="13">Bitlis</option>
<option value="14">Bolu</option>
<option value="15">Burdur</option>
<option value="16">Bursa</option>
<option value="17">Çanakkale</option>
<option value="18">Çankırı</option>
<option value="19">Çorum</option>
<option value="20">Denizli</option>
<option value="21">Diyarbakır</option>
<option value="22">Edirne</option>
<option value="23">Elazığ</option>
<option value="24">Erzincan</option>
<option value="25">Erzurum</option>
<option value="26">Eskişehir</option>
<option value="27">Gaziantep</option>
<option value="28">Giresun</option>
<option value="29">Gümüşhane</option>
<option value="30">Hakkâri</option>
<option value="31">Hatay</option>
<option value="32">Isparta</option>
<option value="33">Mersin</option>
<option value="34">İstanbul</option>
<option value="35">İzmir</option>
<option value="36">Kars</option>
<option value="37">Kastamonu</option>
<option value="38">Kayseri</option>
<option value="39">Kırklareli</option>
<option value="40">Kırşehir</option>
<option value="41">Kocaeli</option>
<option value="42">Konya</option>
<option value="43">Kütahya</option>
<option value="44">Malatya</option>
<option value="45">Manisa</option>
<option value="46">Kahramanmaraş</option>
<option value="47">Mardin</option>
<option value="48">Muğla</option>
<option value="49">Muş</option>
<option value="50">Nevşehir</option>
<option value="51">Niğde</option>
<option value="52">Ordu</option>
<option value="53">Rize</option>
<option value="54">Sakarya</option>
<option value="55">Samsun</option>
<option value="56">Siirt</option>
<option value="57">Sinop</option>
<option value="58">Sivas</option>
<option value="59">Tekirdağ</option>
<option value="60">Tokat</option>
<option value="61">Trabzon</option>
<option value="62">Tunceli</option>
<option value="63">Şanlıurfa</option>
<option value="64">Uşak</option>
<option value="65">Van</option>
<option value="66">Yozgat</option>
<option value="67">Zonguldak</option>
<option value="68">Aksaray</option>
<option value="69">Bayburt</option>
<option value="70">Karaman</option>
<option value="71">Kırıkkale</option>
<option value="72">Batman</option>
<option value="73">Şırnak</option>
<option value="74">Bartın</option>
<option value="75">Ardahan</option>
<option value="76">Iğdır</option>
<option value="77">Yalova</option>
<option value="78">Karabük</option>
<option value="79">Kilis</option>
<option value="80">Osmaniye</option>
<option value="81">Düzce</option>
</select>
</td>
</tr>
<tr>
<td><label for="mesaj">Kendinizi Tanıtınız:</label></td>
<td><textarea name="mesaj" id="mesaj" style="height:90px; width:400px" ></textarea></td>
</tr>
<tr>
<td colspan="2">
<input type="checkbox" id=""required/> Bayilik şartlarını okudum ve kabul ediyorum.
</td>
</tr>
<tr>
<td colspan="2"><input class="readmore2" type="submit" value="Gönder" name="gonder" /></td>
</tr>
</table>