I had users clicking off my page while doing data entry, and I needed to make sure they didn't forget to save their modifications.
Here is a simple example HTML page that implements a rudimentary check. This is not tested for all data types. Enjoy.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Safe Exit Test </title>
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
</head>
<body>
<form action="">
<input type="number" name="value" />
<input type="submit" name="commit" />
</form>
<a href="http://209software.com">209software</a>
<script>
$(document).ready(function () {
formmodified = 0;
$('form *').change(function () {
formmodified = 1;
});
window.onbeforeunload = confirmExit;
function confirmExit() {
if (formmodified == 1) {
return "New information not saved. Do you wish to leave the page?";
}
}
$("input[name='commit']").click(function () {
formmodified = 0;
});
});
</script>
</body>
</html>
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