html - My javascript codes won't work? -


my html page codes : 

<!doctype html>  <html>    <head><meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0">  <meta name="apple-mobile-web-app-capable" content="yes" />  <meta name="mobile-web-app-capable" content="yes" />    </head><link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=material+icons">  <link rel="stylesheet" href="https://code.getmdl.io/1.3.0/material.indigo-pink.min.css">      <script>          function lengthconverter()           {          var inchref,inchtocmresultref;          var inch,centimetres;          inchref=document.getelementbyid("inchtocmvalue");          inchtocmresultref=document.getelementbyid("inchtocmresult");          inch=number(inchref.value);          centimetres=number(inchtocmresultref.value)          centimetres=2.54*inch          inchtocmresultref.innertext=centimetres;                  }          function lengthconvertercmtoinch()          {          var inch2ref,cmtoinchresultref;          var inchtwo,centimetrestwo;          inch2ref=document.getelementbyid("cmtoinchvalue");          cmtoinchresultref=document.getelementbyid("cmtoinchre");          inchtwo=number(inch2ref.value);          centimetrestwo=number(cmtoinchresultref.value)          inchtwo=centimetrestwo/2.54          cmtoinchresultref.innertext=inchtwo;          }      </script>  <script defer src="https://code.getmdl.io/1.3.0/material.min.js">            </script>    <body>          <!-- shows header, in smaller screens. -->  <div class="mdl-layout mdl-js-layout mdl-layout--fixed-header">    <header class="mdl-layout__header">      <div class="mdl-layout__header-row">        <!-- length -->        <span class="mdl-layout-title">length</span>        <!-- add spacer, align navigation right -->        <div class="mdl-layout-spacer"></div>        <!-- navigation. hide in small screens. -->        <nav class="mdl-navigation mdl-layout--large-screen-only">          <a class="mdl-navigation__link" href="">length</a>          <a class="mdl-navigation__link" href="mass.html">mass</a>        </nav>      </div>    </header>    <div class="mdl-layout__drawer">      <span class="mdl-layout-title">change conversion</span>      <nav class="mdl-navigation">        <a class="mdl-navigation__link" href="">length</a>        <a class="mdl-navigation__link" href="mass.html">mass</a>      </nav>    </div>    <main class="mdl-layout__content">      <div class="page-content"><div class="mdl-grid">    <div class="mdl-cell mdl-cell--4-col"><h3>centimetres inches</h3>  <!-- numeric textfield floating label -->  <form action="#">    <div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label">      <input class="mdl-textfield__input" type="text" pattern="-?[0-9]*(\.[0-9]+)?" id="cmtoinchvalue">      <label class="mdl-textfield__label" for="cmtoinchvalue">centimetres...</label>      <span class="mdl-textfield__error">input not number!</span>    </div>  </form>  <!-- raised button ripple --><h4>inches:</h4>  <span id="cmtoinchre"></span><button class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect" onclick="lengthconvertercmtoinch()">convert inches</button>  </div>    <div class="mdl-cell mdl-cell--4-col"><h3>inches centimetres</h3>  <!-- numeric textfield floating label -->  <form action="#">    <div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label">      <input class="mdl-textfield__input" type="text" pattern="-?[0-9]*(\.[0-9]+)?" id="inchtocmvalue">      <label class="mdl-textfield__label" for="inchtocmvalue">inches...</label>      <span class="mdl-textfield__error">input not number!</span>    </div>  </form>    <!-- raised button ripple --><h4>centimetres:</h4>  <span id="inchtocmresult"></span> <button onclick="lengthconverter()" class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect">convert centimetres</button>  </div>  </div>  </div>    </main>  </div>  </body>  </html>

i know it's long piece of code can't find mistake?

i copied codes material design lite(mdl)website interface create webpage convert cm inches , vice versa , links webpage mass making minor changes code.

i input converting function , onclick function myself.

but right side of webpage works while left column returns null?help appreciated.

i changed code in "lengthconvertercmtoinch()" observe here added 1 variable

  function lengthconvertercmtoinch()     {     var inch2ref,cmtoinchresultref;     var inchtwo,centimetrestwo,inchtwo1;     inch2ref=document.getelementbyid("cmtoinchvalue");     cmtoinchresultref=document.getelementbyid("cmtoinchre");     inchtwo=number(inch2ref.value);     centimetrestwo=number(cmtoinchresultref.value)     inchtwo1=inchtwo/2.54     cmtoinchresultref.innertext=inchtwo1;     }

i think problem has resolved

let me know if problem solved


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