A simple program that I wrote using JavaScript that shows how get input values from the user using text box in HTML and submit those values using buttons in HTML into JavaScript. I intended my work for beginners in JavaScript programming this code is most common problem encounters by beginners in JavaScript. I hope this simple code will help them getting started.
If you have some questions please send me an email at jakerpomperada@gmail.com and jakerpomperada@yahoo.com.
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My mobile number here in the Philippines is 09173084360.
Sample Program Output
Program Listing
<html>
<style>
body {
font-family:arial;
font-size:20px;
font-weight:bold;
color:blue;
}
p {
font-family:arial;
font-size:20px;
font-weight:bold;
color: green;
}
</style>
<body>
Enter your name
<input type="text" id="name" size="20" maxlength="20" required>
<br><br>
<button onclick="Greet(this);"> Ok </button>
<button onclick="Clear(this);"> Clear </button>
<br>
<p id="display"> </p>
<script>
function Greet(field)
{
var hello;
var field = document.getElementById('name');
if (field.value == '') {
alert("Field is empty");
document.getElementById('name').value="";
document.getElementById('name').focus();
}
else {
hello = "Hello " + field.value;
document.getElementById("display").innerHTML = hello;
}
}
function Clear(field)
{
var hello;
var field = document.getElementById('name');
if (field.value == '') {
alert("Field is empty");
document.getElementById('name').value="";
document.getElementById('name').focus();
}
else {
document.getElementById('name').value =" ";
document.getElementById("display").innerHTML = "";
document.getElementById('name').focus();
}
}
</script>
</body>
<html>
