CodePen

HTML

            
              <div class="sbmtBtn" onmouseup="document.forms['myform'].submit()">Submit</div>
            
          
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↑ Insert the most common viewport meta tag

CSS

            
              .sbmtBtn{
    width: 80px;
    height: 25px; 
    color: #fff;
    background-color: #ccc;
    border:solid thin #ddd;
    //Use the following to set a shadow only in FF
    -moz-box-shadow: 0 0 3px #000000;
}
            
          
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JS

            
              
            
          
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