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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                
<body>
<div class = "moveable-area"></div>
<div draggable="true" id="calc-frame" onclick="inp.focus();">
  <div id="calc-display">
    <input type = "text" id = "inp-display" onKeyPress="return takeInput(event);" onpaste="return false;" autofocus />
    <div id="tot-display"></div>
    <div id = "sum-display"></div>
  </div>
  <div class="calc-b-panel">
    <button onclick="bPress('/');">÷</button>
    <button onclick="bPress('*');">×</button>
    <button onclick="bPress('-');">-</button>
    <button onclick="bPress('+');">+</button>
    <button onclick="bPress('=');">=</button>
    <button class= "bt-clear" onclick="bPress('a');">AC</button>
    <button onclick="bPress('9');">9</button>
    <button onclick="bPress('6');">6</button>
    <button onclick="bPress('3');">3</button>
    <button onclick="bPress('#');">+/-</button> 
    <button class= "bt-clear" onclick="bPress('c');">C</button>
    <button onclick="bPress('8');">8</button>
    <button onclick="bPress('5');">5</button>
    <button onclick="bPress('2');">2</button>
    <button onclick="bPress('0');">0</button>
    <button onclick="bPress('7');">7</button>
    <button onclick="bPress('4');">4</button>
    <button onclick="bPress('1');">1</button>
    <button onclick="bPress('.');">.</button>
  </div>

</div>

<div class="info-tag">
  <p><b>Calculator</b><br>
  by Kevin Nolan</p>
  <p>Use buttons or keyboard:<br>
  a: all-clear<br>
  c: clear<br>
  #: +/-</p>
  <p>Drag the calculator<br> with your mouse</p>
  
</div>

              
            
!

CSS

              
                
* {
  font-family: 'Catamaran', sans-serif;
  box-sizing: border-box;
}
  
body {
  background: url('https://dl.dropbox.com/s/q3sq8g7mlifkg2z/seashells_CbKDpTB.jpg') fixed no-repeat;
  background-position: 0px 0px;
  background-size:1200px 500px;
}
  
#calc-frame {
  background: url('https://dl.dropbox.com/s/q3sq8g7mlifkg2z/seashells_CbKDpTB.jpg') fixed no-repeat;
  background-position: -20px -20px;
  background-size:1240px 540px;
  border: 1px solid rgba(0, 0, 0, .15);
  border-radius: 70px;
  box-shadow: 5px 5px 30px 5px rgba(0, 0, 0, .50);
  width: 300px;
  height: 400px;
  top: 50px;
  margin: auto;
  position:relative;
  cursor: -webkit-grab;
  cursor: -moz-grab;
}
  
#calc-display {
  border: 1px solid #999;
  color: white;
  border-radius: 20px;
  background: linear-gradient(
    rgba(0, 0, 0, .6), 
    rgba(0, 0, 0, .8));
  width: 270px;
  height: 80px;
  position: absolute;
  left:15px;
  top: 30px;

}

#tot-display {
  background-color: transparent;
  width: 250px;
  height: 20px;
  text-align:right;
  position: absolute;
  left:5px;
  top: 55px;
}

#inp-display {
  border:0px;
  background-color: transparent;
  color:white;
  width: 260px;
  height: 40px;
  text-align:right;
  font-size:35px;
  position: absolute;
  left:5px;
  top: 18px;
}
#inp-display:focus {
  outline:0;
}

#sum-display {
  background-color: transparent;
  width: 260px;
  height: 20px;
  position: absolute;
  left:15px;
  top: 0px;
}

.calc-b-panel {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-flow: column wrap-reverse;
  flex-flow: column wrap-reverse;
  -webkit-justify-content: flex-end;
  justify-content: flex-end;
  
  width: 270px;
  height: 260px;
  position: absolute;
  left:10px;
  top: 110px;
}

.calc-b-panel button {
  border: 0px solid green;
  margin: 5px;
  border-radius: 10px;
  color: white;
  background-color:rgba(0, 0, 0, .70);
  font-size: 30px;
  width: 50px;
  height: 40px;
  line-height: 0px;
  cursor: pointer;
}
.calc-b-panel button:hover {
  background-color: rgba(50, 50, 255, .70);
}
.calc-b-panel button:active {
  background-color: rgba(0, 200, 200, .70);
}
  
.calc-b-panel .bt-clear {
  background-color:rgba(255, 50, 50, .70);
}
  
.moveable-area {
  z-index: -2;
  position: absolute;
  width: 1200px;
  height: 500px;
}
  
.info-tag {
  background-color: #fff5f0;
  padding: 5px;
  position: fixed;
  z-index: -1;
  bottom: 0; left: 0;
  font-size: 15px;
}
  .info-tag p {
    margin: 0px 3px 3px 0px;
  }
    
              
            
!

JS

              
                //Calculator:
var sumArr = [];
var numRE = /\d/;
var inp = document.getElementById("inp-display");
var tallied = false; // True if sum is complete
//Movement:
var dm = document.getElementById('calc-frame');
dm.addEventListener('dragstart',drag_start,false);
document.body.addEventListener('dragover',drag_over,false);
document.body.addEventListener('drop',drop,false);  
  
// CALCULATOR FUNCTIONS ------------
// Related to working the calculator

function takeInput(oKeyEvent) {
  var tSF = document.getElementById("tot-display");
  var sSF = document.getElementById("sum-display");

  function soFar(op) {
    
    // Add number and operator to array
    sumArr.push(parseFloat(inp.value)); sumArr.push(op); 
    // Tally sumArr
    var total = sumArr.reduce(function (acc,item,ind) {
      if (ind == 0) {acc = item} // First item in array
      else if (numRE.test(item)) {  // Only act on numbers
        if (sumArr[ind-1] == '+') acc += item;
        else if (sumArr[ind-1] == '−') acc -= item;
        else if (sumArr[ind-1] == '×') acc *= item;
        else if (sumArr[ind-1] == '÷') acc /= item;
      }
      return acc;
    },0);
    sSF.innerHTML = sumArr.reduce(function(acc,item) {
      acc+=item + " ";
      return acc;
    },"");
    if (op == "=") {
      inp.value = total;
      tSF.innerHTML = "";
      // sumArr = []; // Redundant?
      tallied = true;
      inp.style.color = 'yellow';
    } else {
      inp.value="";
      tSF.innerHTML = total;
      //inp.style.color = 'white';
    }
  }
  
  function reset() {
    //if (!keep) inp.value=""; // If Keep then retain old value
    sSF.innerHTML = "";
    tSF.innerHTML = "";
    sumArr=[];
    tallied = false;
    inp.style.color='white';
  }
  
  var key = oKeyEvent.key;
  if (tallied) {
    if (numRE.test(key)) inp.value = ""; // Most calculators start afresh like this
    reset();
  }
  if (key == "c") {
    inp.value="";
  } else if (key == "a") {
    reset();
    inp.value="";
  } else if (key == "#" && inp.value != 0) {
    inp.value = -inp.value;
  } else if (numRE.test(key)) {
    inp.value += key;
  } else if (key == ".") {
    if (inp.value.indexOf('.') < 0) inp.value += key;
  } else if (numRE.test(inp.value)) { // If there's a number to operate on...  
    if (key == "+") soFar("+");
    else if (key == "-") soFar("−");
    else if (key == "*") soFar("×");
    else if (key == "/") soFar("÷");
    else if (key == "=" || key == "Enter") soFar("=");
  }
  // Always return false as user is not directly typing
  // into input box.
  return false;
}
  
function bPress(bttn) {
  takeInput({key: bttn});
  inp.focus();
}

// MOVEMENT FUNCTIONS--------------------
// Everything related to dragging the calculator
  
function drag_start(event) {
  var style = window.getComputedStyle(event.target, null);
  event.dataTransfer.setData("text/plain", (parseInt(style.getPropertyValue("left"),10) - event.clientX) + ',' + (parseInt(style.getPropertyValue("top"),10) - event.clientY));
}
function drag_over(event) {
  event.preventDefault();
  return false;
}
function drop(event) {
  var offset = event.dataTransfer.getData("text/plain").split(',');
  dm.style.left = (event.clientX + parseInt(offset[0],10)) + 'px';
  dm.style.top = (event.clientY + parseInt(offset[1], 10)) + 'px';
  event.preventDefault();
  inp.focus();
  return false;

}
  

              
            
!
999px

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