first.js
function calc()
{
//----------------Calculate
Net Salary--------------
var
y=parseInt(document.forma.t3.value)
var
hra=parseInt(y*8/100)
var
da=parseInt(y*5/100)
var
ta=parseInt(y*3/100)
var
ns=parseInt(y+hra+da+ta)
alert("Net
salary:"+ns);
}
salary.html
<html>
<head>
<link rel="stylesheet"
type="text/css" href="style.css">
<script type="text/javascript"
src="first.js"></script>
</head>
<body>
<center> Employee Details </center>
<table align="center">
<form action="#"
name="forma">
<tr>
<td>Employee no: </td>
<td> <input type="text"
name="n1" id="n1"> </td>
</tr>
<tr>
<td> Name: </td>
<td> <input type="text"
name="t2" id="t2"> </td>
</tr>
<tr>
<td> Basic Salary: </td>
<td> <input type="text"
name="t3" id="t3"> </td>
</tr>
<tr>
<td colspan="2">
<center> <input type="button"
value="Net Salary" onclick="return vali();"
ondblclick="return calc();"/><input type="button"
value="Clear"> </center>
</td>
</tr>
</form>
</table>
</body>
</html>