I get this error:

Uncaught SyntaxError: Unexpected end of input

I don't know what I am missing

<input class="myButton" type="button" name="slaapkamer1aan" value="AAN" onclick="slaapkameron("slaapkamer1")">

var kamer = document.getElementById(x);
            if (kamer.src.match("lichtUit.png")) {
                kamer.src = "lichtAan.png";
            }
            else {
                kamer.src = "lichtAan.png";
            }

        <?php slaapkameraan();?>
}

any ideas?