javascript - Plus Arithmetic Operation

Question

I've tried use Plus Arithmetic Operation to calculate 2 input text type number values, but my result was the values are "together", like that:

• Value one: 5
• Value two: 5

Result

55

Wanted Result

10

Code

<script type="text/javascript">
   function cal(){
    var plus = document.getElementById('plus').value,
        plus1 = document.getElementById('plus1').value;
    var x = plus + plus1;
    var result = document.getElementById('result');
    if(result.value == ""){
     result.innerHTML = "?";
    }
    else{
     result.innerHTML = x;
    }
  }
</script>

<input type="text" id="plus" /> + <input type="text" id="plus1" /> = <span id="result"></span>

How can I get plus result instead couple of numbers together?

Answer 1

var plus = parseInt(document.getElementById('plus').value, 10),
    plus1 = parseInt(document.getElementById('plus1').value, 10);

This will do what you want.