<html>
<head>
<script>
function findGS()
{
var bsBox = document.getElementById("input1")
var bs = parseInt(bsBox.value)
var taBox = document.getElementById("input2")
var ta = parseInt(taBox.value)
var daBox = document.getElementById("input3")
var da = parseInt(daBox.value)
var gs = bs + ta + da
var resultBox = document.getElementById("result")
resultBox.innerHTML = "Gross Salary = " + gs
}
</script>
</head>
<body>
<input type="text" placeholder="Basic Salary" id="input1"/>
<br>
<input type="text" placeholder="TA" id="input2"/>
<br>
<input type="text" placeholder="DA" id="input3"/>
<br>
<input type="button" value="Find GS" onclick="findGS()"/>
<div id="result">
GS = 0
</div>
</body>
</html>
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