Sum of Digits in JavaScript

Write a program to accept a no. from user and display Sum of Digits.
(example: 214= 2+1+4 =  7)



Enter a Number:


JavaScript Code:

<HTML><body>
<script>
function find()
  {
 var sum=0;
    var no=parseInt(frm.txt1.value);
    while(no>0)
     {
       sum=sum+no%10;
       no=Math.floor(no/10);
      }
    alert("Sum of digits  "+sum);    
         
   }
</script>
<form name="frm">


Enter a Number:<input name="txt1" type="text" />
<input name="b1" onclick="find();" type="button" value="display" /></form>
</BODY>
</HTML>

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