A simple program that I wrote using Javascript using Onkeyup event to add the sum of the three numbers and display the result on the screen. I hope you will find my work useful. Thank you.
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work, computer tutorials, and web development work kindly contact me in the following email address for further details. If you want to advertise on my website kindly contact me also in my email address also. Thank you.
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Sample Program Output
Program Listing
<html>
<body>
<script type="text/javascript">
function isNumber(evt) {
evt = (evt) ? evt : window.event;
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode > 31 && (charCode < 48 || charCode > 57)) {
return false;
}
return true;
}
function getValues(){
var initial_value =0;
if (document.getElementById('one').value==''){
document.getElementById('display').value =initial_value;
} else if (document.getElementById('two').value=='' ) {
document.getElementById('display').value =initial_value;
}
else if (document.getElementById('three').value=='' ) {
document.getElementById('display').value =initial_value;
}
var numVal1=parseInt(document.getElementById("one").value);
var numVal2=parseInt(document.getElementById("two").value);
var numVal3=parseInt(document.getElementById("three").value);
sum = numVal1 + numVal2 + numVal3;
document.getElementById("display").value = sum;
}
</script>
<style>
input.numbox{
width:30px;
height:20px;
}
textarea.mainbox{
width:200px;
height:100px;
}
</style>
<br>
<h2> Addition of Three Numbers Using Onkeyup in JavaScritpt </h2>
First Value
<input class="numbox" type="text" id="one" value="0"
onkeypress="return isNumber(event)" onkeyup="getValues()" /><br/>
Second Value
<input class="numbox" type="text" id="two" value=""
onkeypress="return isNumber(event)" onkeyup="getValues()"/><br/>
Third Value
<input class="numbox" type="text" id="three" value=""
onkeypress="return isNumber(event)" onkeyup="getValues()"/><br/>
<br/><br>
The total sum <input class="numbox" type="text" id="display" value="0" readonly>
</body>
</html>
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