<!DOCTYPE html>
<html>
<head>
<title>DOM Access</title>
<script type="text/javascript">// <![CDATA[
function valideraData() {
var textfaltvarde = document.getElementById("textfalt01").value;
if (textfaltvarde != '') {
alert("Du skrev: " + textfaltvarde);
} else {
alert("Du måste skriva något!");
}
}
// ]]></script>
<body>
<form name="form">
<input type="text" name="faltvarde" id="textfalt01" />
<input type="button" value="Skicka Data" onclick="valideraData()" />
</form>
</body>
</html>