WAP to Calculate simple interest in JavaScript.
<html>
<head>
<title>
Interest </title>
<script
type="text/javascript">
function
simp()
{
{
year=document.getElementById('t1').value;
amt=document.getElementById('t2').value;
rate=document.getElementById('t3').value;
//-------------Validation for
year------------
if(document.getElementById('t1').value
=='')
{
alert("You must
enter year");
return false;
}
var a =
document.getElementById('t1').value;
if(isNaN(a)||a.indexOf("
")!=-1)
{
alert("Invalid number in
year field");
return false;
}
if((year)<0 || (year)>5)
{
alert("year enter bet
0-5");
return false;
}
//-----------------Validation for
principal------------------
if(document.getElementById('t2').value
=='')
{
alert("You must
enter principal");
return false;
}
var b =
document.getElementById('t2').value;
if(isNaN(b)||b.indexOf("
")!=-1)
{
alert("Invalid number in
principal field");
return false;
}
//-------------------Validation for
Rate---------------------
if(document.getElementById('t3').value
=='')
{
alert("You must
enter rate");
return false;
}
var c =
document.getElementById('t3').value;
if(isNaN(c)||c.indexOf("
")!=-1)
{
alert("Invalid number in
rate field");
return false;
}
if((rate)<0 || (rate)>10)
{
alert("Rate enter bet
1-10");
return false;
}
return true;
}}
function
calc()
{
//----------------Calculate
interest--------------
var y=document.forma.t1.value
var prin=document.forma.t2.value
var r=document.forma.t3.value
var interest=parseInt(y*prin*r/100)
document.forma.out.value=interest
}
function
comp()
{
//----------------Calculate Compund
interest--------------
var y=document.forma.t1.value
var
prin=parseInt(document.forma.t2.value)
var r=document.forma.t3.value
var interest=parseInt(y*prin*r/100)
var ci=parseInt(interest + prin)
document.forma.out.value=ci
}
</script>
</head>
<body><center>
Application to calculate interest</center>
<table
align="center">
<form
action="#" name="forma">
<tr>
<td>
Enter
Years: </td>
<td>
<input type="text" name="t1" id="t1">
</td>
</tr>
<tr>
<td>
Enter Principal: </td>
<td>
<input type="text" name="t2" id="t2">
</td>
</tr>
<tr>
<td>
Enter
Rate: </td>
<td>
<input type="text" name="t3" id="t3">
</td>
</tr>
<tr>
<td>
Result: </td>
<td>
<input type="text" name="out" id="out">
</td>
</tr>
<tr>
<td
colspan="2">
<input type="button"
value="Simple Interest" onclick="return simp();"
ondblclick="return
calc();"/>
<input
type="button" value="Compund Interest" onclick="return
comp();">
</td>
</tr>
</form>
</table>
</body>
</html>
