tom_ozi,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
</head>
<body>
<form>
<input type="button" id="ggt" value="open" onclick="dawn(this)"> <script type=
"text/javascript">
function dawn(input)
{
input.value = input.value != 'close' ? 'close' : 'open'
}
</script>
</form>
</body>
</html>