'************************************** ' Name: Addition of Three Numbers Using ' Onkeyup in JavaScritpt ' Description:A simple program that I wr ' ote 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. ' I am currently accepting programming work, IT projects, school and application development. programming projects, thesis and capstone projects, IT consulting. 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. My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com. My mobile number here in the Philippines is 09173084360. My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675. Here in Bacolod I also accepting computer repair, networking and Arduino Project development at a very affordable price. My personal website is http://www.jakerpomperada.com ' By: Jake R. Pomperada ' ' ' Inputs:None ' ' Returns:None ' 'Assumes:None ' 'Side Effects:None '************************************** <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>