Function with one argument
<!DOCTYPE html>
<html>
<head>
<script>
function usefunction(txt) {
alert(txt);
}
</script>
</head>
<body>
<form>
<input type="button" onclick="usefunction(' Good Morning ')" value="It's Morning" >
<input type="button" onclick="usefunction(' Good Evening ')" value="It's Evening" >
</form>
<p>
<strong>Note : </strong>
When you click on one of the buttons, a function will be called.
The function will alert the argument that is passed to it.
</p>
</body>
</html>