title: Why the form is not performing validation?
body: <p>I have created a following form.
  it accepts the data, makes entry in database correctly.
  but it also accepts blank inputs.
  i have done following code to perform validations but its not working.</p>
  
  <pre><code>&lt;form novalidate="" name="storeForm" action="book.php" onsubmit="book.php"
      method="POST"&gt;
      &lt;div class="storeInputContainer"&gt;
          &lt;input class="storeInput" placeholder="Name *" name="Name" type="text"
              required&gt;
      &lt;/div&gt;
      &lt;div class="storeInputContainer"&gt;
          &lt;input class="storeInput" placeholder="Phone Number *" name="Number"
              type="phone" required&gt;
      &lt;/div&gt;
      &lt;div class="lineBreak"&gt;
          &lt;br&gt;
      &lt;/div&gt;
      &lt;div class="storeInputContainer"&gt;
          &lt;input class="storeInput" placeholder="Address *" name="Address"
              type="text" required&gt;
      &lt;/div&gt;
      &lt;div class="storeInputContainer"&gt;
          &lt;select name="Postcode" value="" placeholder="Post Code/Area"
              class="storeInput" required onchange="myNewfunction(this);"&gt;
  
              &lt;option value="411002"&gt;411002 (Pune City H.O.)&lt;/option&gt;
              &lt;option value="411004"&gt;411004 (Deccan Gymkhana)&lt;/option&gt;
              &lt;option value="411005"&gt;411005 (Shivajinagar H.O.)&lt;/option&gt;
              &lt;option value="411006"&gt;411006 (Yerawada)&lt;/option&gt;
              &lt;option value="411007"&gt;411007 (Ganeshkhind)&lt;/option&gt;
              &lt;option value="411008"&gt;411008 (N.C.L.)&lt;/option&gt;
              &lt;option value="411009"&gt;411009 (Parvati)&lt;/option&gt;
              &lt;option value="411010"&gt;411010 (S.S.C. Board)&lt;/option&gt;
              &lt;option value="411011"&gt;411011 (Kasba Peth)&lt;/option&gt;
              &lt;option value="411012"&gt;411012 (Dapodi)&lt;/option&gt;
              &lt;option value="411013"&gt;411013 (Hadapsar)&lt;/option&gt;
              &lt;option value="411014"&gt;411014 (Dunkirk Line)&lt;/option&gt;
              &lt;option value="411015"&gt;411015 (Dighi Camp)&lt;/option&gt;
              &lt;option value="411016"&gt;411016 (Model Colony)&lt;/option&gt;
              &lt;option value="411017"&gt;411017 (Pimpri Colony)&lt;/option&gt;
              &lt;option value="411018"&gt;411018 (Pimpri Penicillin Factory)&lt;/option&gt;
              &lt;option value="411019"&gt;411019 (Chinchwad East)&lt;/option&gt;
              &lt;option value="411020"&gt;411020 (Khadaki/Range Hill)&lt;/option&gt;
              &lt;option value="411021"&gt;411021 (Armament )&lt;/option&gt;
              &lt;option value="411022"&gt;411022 (S.R.P.F.)&lt;/option&gt;
              &lt;option value="411023"&gt;411023 (N.D.A.)&lt;/option&gt;
              &lt;option value="411024"&gt;411024 (Khadakwasala)&lt;/option&gt;
              &lt;option value="411025"&gt;411025 (I.A.T. Pune)&lt;/option&gt;
              &lt;option value="411026"&gt;411026 (Bhosari Indus.estate)&lt;/option&gt;
              &lt;option value="411027"&gt;411027 (Aundh Camp)&lt;/option&gt;
              &lt;option value="411028"&gt;411028 (Hadapsar_)&lt;/option&gt;
              &lt;option value="411030"&gt;411030 (S.P. College)&lt;/option&gt;
              &lt;option value="411031"&gt;411031 (C.M.E.)&lt;/option&gt;
              &lt;option value="411032"&gt;411032 (I.A.F. station)&lt;/option&gt;
              &lt;option value="411033"&gt;411033 (Chinchwad Gaon)&lt;/option&gt;
              &lt;option value="411034"&gt;411034 (Kasarwadi)&lt;/option&gt;
              &lt;option value="411035"&gt;411035 (Akurdi)&lt;/option&gt;
              &lt;option value="411036"&gt;411036 (Mundhwa)&lt;/option&gt;
              &lt;option value="411037"&gt;411037 (Market Yard)&lt;/option&gt;
              &lt;option value="411038"&gt;411038 (Kothrud/Ex. Service man colony)&lt;/option&gt;
              &lt;option value="411039"&gt;411039 (Bhosari Gaon)&lt;/option&gt;
              &lt;option value="411040"&gt;411040 (Wanawadi)&lt;/option&gt;
              &lt;option value="411041"&gt;411041 (Wadgaon Budruk)&lt;/option&gt;
              &lt;option value="411042"&gt;411042 (Swargate)&lt;/option&gt;
              &lt;option value="411043"&gt;411043 (Dhankawadi)&lt;/option&gt;
              &lt;option value="411044"&gt;411044 (Pimpri Chinchwad)&lt;/option&gt;
              &lt;option value="411045"&gt;411045 (Pashan)&lt;/option&gt;
              &lt;option value="411046"&gt;411046 (Katraj)&lt;/option&gt;
              &lt;option value="411047"&gt;411047 (Lohgaon)&lt;/option&gt;
              &lt;option value="411048"&gt;411048 (N.I.B.M.)&lt;/option&gt;
              &lt;option value="411051"&gt;411051 (Anandnagar)&lt;/option&gt;
              &lt;option value="411052"&gt;411052 (Navasahyadri/Warje Malwadi)&lt;/option&gt;
              &lt;option value="411053"&gt;411053 (Shivaji Hsg Society)&lt;/option&gt;
          &lt;/select&gt;
      &lt;/div&gt;
  
      &lt;div class="extraLarge"&gt;&lt;/div&gt;
      &lt;div class="callBack"&gt;
          &lt;button type="submit" class="callBackBtn"&gt; Call me Back&lt;/button&gt;
      &lt;/div&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>please Help me regarding this.
  Thanks in Advance</p>