[i am not able to get the desired output of getting the simple interest....here innerhtml is not responding to set the value of id = 'result' field......here i have posted my code part..
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Document</title>
<script type="text/javascript">
function fun1()
{
var a = document.getElementById('p').value ;
var b = document.getElementById('n').value ;
var c = document.getElementById('r').value ;
var result = document.getElementById('result');
result.innerHTML = "The interest is" + (p*n*r/100) ;
}
</script>
</head>
<body>
<form name="form1">
<label> Enter Principal amount :
<input type="text" id="p"><br>
</label>
<label> Enter no. of years :
<input type="text" id="n"><br>
</label>
<label> Enter rate :
<input type="text" id="r"><br>
</label>
<button type="submit" onclick="fun1()"> calculate </button>
<p id="result">
</p>
</form>
<script type="text/javascript">
</script>
</body>
</html>
][1]
Your values are a,b,c, not p,n,r. So use a,b,c to calculate result. And use preventDefault() when the form is submitted so that the page does not refresh.
function fun1(event)
{
event.preventDefault()
var a = document.getElementById('p').value ;
var b = document.getElementById('n').value ;
var c = document.getElementById('r').value ;
var result = document.getElementById('result');
result.innerHTML = "The interest is" + (a*b*c/100) ;
}<form name="form1" onSubmit = "fun1(event)">
<label> Enter Principal amount :
<input type="text" id="p"><br>
</label>
<label> Enter no. of years :
<input type="text" id="n"><br>
</label>
<label> Enter rate :
<input type="text" id="r"><br>
</label>
<button> calculate </button>
<p id="result">
</p>
</form>