'************************************** ' Name: Addition of Four Numbers in Java ' Script ' Description:In this article I would li ' ke to share with you a simple program th ' at I wrote while learning how to program ' in Javascript I called this program addi ' tion of four numbers it uses html form t ' o accept and compute the total sum of fo ' ur numbers. I also included a clear butt ' on to clear the text box in order for th ' e user to input new series of values. If you have some questions about programming, about my work please send me an email at jakerpomperada@gmail.com and jakerpomperada@yahoo.com. People here in the Philippines can contact me at my mobile number 09173084360. Thank you very much and Happy Programming. ' By: Jake R. Pomperada ' ' ' Inputs:None ' ' Returns:None ' 'Assumes:None ' 'Side Effects:None '************************************** <html> <head> </head> <script type="text/javascript"> function addition_four() { var first = document.getElementById("textbox1").value; var second = document.getElementById("textbox2").value; var third = document.getElementById("textbox3").value; var fourth = document.getElementById("textbox4").value; var answer =parseInt(first)+parseInt(second) +parseInt(third)+parseInt(fourth); var textbox5 = document.getElementById('textbox5'); textbox5.value=answer; } function clear_box() { document.getElementById("textbox1").value=""; document.getElementById("textbox2").value=""; document.getElementById("textbox3").value=""; document.getElementById("textbox4").value=""; document.getElementById("textbox1").focus(); } </script> <body> <font face="arial" color="blue"> <h3> Addition of Four Numbers</h3> <input type="text" name="textbox1" id="textbox1" size="3"/> + <input type="text" name="textbox2" id="textbox2" size="3" /> + <input type="text" name="textbox3" id="textbox3" size="3" /> + <input type="text" name="textbox4" id="textbox4" size="3" /> <input type="submit" name="button" id="button1" onclick="addition_four()" value=" = " title="Click here to find the sum of four values" /> <br/><br> Your answer is <input type="text" name="textbox5" id="textbox5" size="10" readonly="true"/> <br><br> <input type="submit" name="button" id="button1" onclick="clear_box()" value="Clear" title="Click here to clear text fields."/> </body></font> </html>