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CSS

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HTML 

              
                <center>
  <div id="a" class="screen">
    <p class="a" id="output"></p>
  </div>
  <section class="keyboard" id="keyboard1">
    <section class="row-1">
      <div class="key w2">
        <div class="first-ch">~</div>
        <div class="second-ch">`</div>
      </div>
      <div class="key w2">
        <div class="first-ch">!</div>
        <div class="second-ch">1</div>
      </div>
      <div class="key w2">
        <div class="first-ch">@</div>
        <div class="second-ch">2</div>
      </div>
      <div class="key w2">
        <div class="first-ch">#</div>
        <div class="second-ch">3</div>
      </div>
      <div class="key w2">
        <div class="first-ch">$</div>
        <div class="second-ch">4</div>
      </div>
      <div class="key w2">
        <div class="first-ch">%</div>
        <div class="second-ch">5</div>
      </div>
      <div class="key w2">
        <div class="first-ch">^</div>
        <div class="second-ch">6</div>
      </div>
      <div class="key w2">
        <div class="first-ch">&amp;</div>
        <div class="second-ch">7</div>
      </div>
      <div class="key w2">
        <div class="first-ch">*</div>
        <div class="second-ch">8</div>
      </div>
      <div class="key w2">
        <div class="first-ch">(</div>
        <div class="second-ch">9</div>
      </div>
      <div class="key w2">
        <div class="first-ch">)</div>
        <div class="second-ch">0</div>
      </div>
      <div class="key w2">
        <div class="first-ch">_</div>
        <div class="second-ch">-</div>
      </div>
      <div class="key w2">
        <div class="first-ch">+</div>
        <div class="second-ch">=</div>
      </div>
      <div class="key w4">Backspace</div>
    </section>
    <section class="row-2">
      <div class="key w3">Tab</div>
      <div class="key w2" id="Q">q</div>
      <div class="key w2">w</div>
      <div class="key w2">e</div>
      <div class="key w2">r</div>
      <div class="key w2">t</div>
      <div class="key w2">y</div>
      <div class="key w2">u</div>
      <div class="key w2">i</div>
      <div class="key w2">o</div>
      <div class="key w2">p</div>
      <div class="key w2">
        <div class="first-ch">{</div>
        <div class="second-ch">[</div>
      </div>
      <div class="key w2">
        <div class="first-ch">}</div>
        <div class="second-ch">]</div>
      </div>
      <div class="key w3">
        <div class="first-ch">|</div>
        <div class="second-ch">\</div>
      </div>
    </section>
    <section class="row-3">
      <div class="key w4">Caps Lock</div>
      <div class="key w2">a</div>
      <div class="key w2">s</div>
      <div class="key w2">d</div>
      <div class="key w2">f</div>
      <div class="key w2">g</div>
      <div class="key w2">h</div>
      <div class="key w2">j</div>
      <div class="key w2">k</div>
      <div class="key w2">l</div>
      <div class="key w2">
        <div class="first-ch">:</div>
        <div class="second-ch">&#59;</div>
      </div>
      <div class="key w2">
        <div class="first-ch">"</div>
        <div class="second-ch">'</div>
      </div>
      <div class="key w4">Enter</div>
    </section>
    <section class="row-4">
      <div class="key w5">Shift</div>
      <div class="key w2">z</div>
      <div class="key w2">x</div>
      <div class="key w2">c</div>
      <div class="key w2">v</div>
      <div class="key w2">b</div>
      <div class="key w2">n</div>
      <div class="key w2">m</div>
      <div class="key w2">
        <div class="first-ch">&lt;</div>
        <div class="second-ch">,</div>
      </div>
      <div class="key w2">
        <div class="first-ch">&gt;</div>
        <div class="second-ch">.</div>
      </div>
      <div class="key w2">
        <div class="first-ch">?</div>
        <div class="second-ch">/</div>
      </div>
      <div class="key w5">Shift</div>
    </section>
    <section class="row-5">
      <div class="key w3">Ctrl</div>
      <div class="key w2">Win</div>
      <div class="key w3">Alt</div>
      <div class="key w12"> </div>
      <div class="key w3">Alt</div>
      <div class="key w2">Win</div>
      <div class="key w2">Spl</div>
      <div class="key w3">Ctrl</div>
    </section>
  </section>
</center>
!

CSS 

              
                html,
body {
  width: 100%;
  height: 100%;
}
.keyboard {
  background: #999;
  border-radius: 4px;
  color: #555;
  font: bold 16px Helvetica, Arial;
  margin: 10px 15px 25px 0;
  padding: 8px;
  position: relative;
  -moz-user-select: none;
  -webkit-user-select: none;
  width: 875px;
  zoom: 0.9;
}

.key {
  background: -webkit-linear-gradient(
    left,
    #ccc 0%,
    #d8d8d8 20px,
    #e5e5e5 35px,
    #fafafa 100%
  );
  border: 6px solid transparent;
  border-width: 5px 5px 8px 6px;
  border-image: -moz-linear-gradient(
      top,
      #999 0%,
      #bbb 45%,
      #bbb 55%,
      #ccc 95%,
      #ddd 100%
    )
    49%;
  border-image: -webkit-linear-gradient(
      top,
      #999 0%,
      #bbb 45%,
      #bbb 55%,
      #ccc 95%,
      #ddd 100%
    )
    49%;
  box-shadow: 3px -5px 6px rgba(100, 100, 100, 0.6),
    -4px -4px 6px rgba(100, 100, 100, 0.4),
    4px -2px 5px rgba(100, 100, 100, 0.5);
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  cursor: pointer;
  display: inline-block;
  height: 60px;
  margin: 1px 0;
  padding: 2px 0 0 5px;
  position: relative;
  vertical-align: top;
}

.key:active {
  background: -moz-linear-gradient(
    left,
    #c8c8c8 0%,
    #d8d8d8 20px,
    #e5e5e5 35px,
    #fafafa 100%
  );
  background: -webkit-linear-gradient(
    left,
    #c8c8c8 0%,
    #d8d8d8 20px,
    #e5e5e5 35px,
    #fafafa 100%
  );
  box-shadow: 1px -3px 6px rgba(100, 100, 100, 0.6),
    -3px -3px 6px rgba(100, 100, 100, 0.3),
    4px -2px 6px rgba(100, 100, 100, 0.3);
  top: 1px;
}

.w2 {
  text-transform: uppercase;
  width: 54px;
}

.w3 {
  width: 83px;
}

.w4 {
  width: 112px;
}

.w5 {
  width: 141px;
}

.w12 {
  width: 344px;
}

.screen {
  text-align: left;
  border: 5px solid #444;
  border-radius: 10px;
  height: 300px;
  overflow: auto;
  padding: 5px;
  width: 80% !important;
}

@-webkit-keyframe blinker {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

#a,
.a {
  width: 100%;
}
!

JS 

              
                var init = function () {
  var shift = false;
  var caps = false;

  $(".key").mousedown(function () {
    // Setting the content to grab
    var content = $(this).html();
    var outputContent = $("#output").html();

    if (content.substr(0, 4) == "<div") {
      if (shift) {
        var subDiv = $(this).find(".first-ch");
      } else {
        var subDiv = $(this).find(".second-ch");
      }
      content = subDiv.html();
    }

    // Setting special output, and then outputting
    if (content == "Backspace") {
      var stuff = outputContent;
      var x = stuff.length - 1;

      if (stuff.charAt(x) == ">") {
        var tagStart = stuff.lastIndexOf("<");
        $("#output").html(stuff.substr(0, tagStart));
      } else if (stuff.charAt(x) == ";") {
        var charStart = stuff.lastIndexOf("&");
        $("#output").html(stuff.substr(0, charStart));
      } else {
        $("#output").html(stuff.substr(0, x));
      }
    } else if (content == "Enter") {
      content = "<br />";
      $("#output").html($("#output").html() + content);
    } else if (content == "Tab") {
      content = "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
      $("#output").html($("#output").html() + content);
    } else if (content == "Shift") {
      if (shift) {
        shift = false;
      } else {
        shift = true;
      }
    } else if (content == "Caps Lock") {
      if (caps) {
        caps = false;
      } else {
        caps = true;
      }
    } else if (
      content == "Ctrl" ||
      content == "Alt" ||
      content == "Win" ||
      content == "Spl"
    ) {
    } else {
      // i.e. a letter
      capitalize = false;

      if (shift) {
        capitalize = !capitalize;
        shift = false;
      }

      if (caps) {
        capitalize = !capitalize;
      }

      if (content.length == 1 && capitalize) {
        content = content.toUpperCase();
      }

      $("#output").html($("#output").html() + content);
    }

    outputContent = $("#output").html();

    // creating the automatic line break
    var sinceLastTag, relevantString, start, end, snippet;
    sinceLastTag = outputContent.lastIndexOf(">");
    relevantString = outputContent
      .substring(sinceLastTag)
      .replace("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;", "1111");
    var relevantLength = relevantString.length;

    if (relevantLength > 1) {
      start = relevantString.indexOf("&");
      end = relevantString.indexOf(";") + 1;
      snippet = relevantString.substring(start, end);
      relevantString = relevantString.replace(snippet, "1");
    }

    if (relevantLength % 41 === 0 && relevantLength > 0) {
      var sweetSpot = outputContent.lastIndexOf(" ");
      var firstHalf = outputContent.substring(0, sweetSpot);
      var secondHalf = outputContent.substring(sweetSpot);

      $("#output").html(firstHalf + "<br />" + secondHalf);
    }
  });
};

$(document).ready(function () {
  init();
});
!
999px

Console