formulier

<script language="Javascript">
    function checkAll(formId, controllerId) {

        if (document.getElementById(controllerId).checked) {
            var checkBox = true;
        } else {
            var checkBox = false;
        }

        for (var i = 0; i < document.getElementById(formId).elements.length; i++) {
            document.getElementById(formId).elements[i].checked = checkBox;
        }
        
        return true;
    }
</script>

<form id="inbox" action="" method="POST">
<input type="checkbox" name="message[]" id="message[]" value="1" /> Welcome to this messageboard<br />
<input type="checkbox" name="message[]" id="message[]" value="2" /> Hi there, can I ask a question?<br />
<input type="checkbox" name="message[]" id="message[]" value="3" /> Could you do me a favour?<br />
<input type="checkbox" name="message[]" id="message[]" value="4" /> My login info<br />
<input type="checkbox" name="message[]" id="message[]" value="5" /> Example script<br />
<input type="checkbox" name="message[]" id="message[]" value="6" /> Explain plz...<br />
<input type="checkbox" name="message[]" id="message[]" value="7" /> You are an idiot, you know that<br />
<input type="checkbox" name="message[]" id="message[]" value="8" /> Your account has been suspended<br />
</form>

<br />
<br />

<input type="checkbox" name="checkAllCont" id="checkAllCont" onClick="return checkAll('inbox', 'checkAllCont');"/> Check All

<script language="Javascript">
    function checkAll(formId, controllerId) {
 
        if (document.getElementById(controllerId).checked) {
            var checkBox = true;
        } else {
            var checkBox = false;
        }
 
        for (var i = 0; i < document.getElementById(formId).elements.length; i++) {
            document.getElementById(formId).elements[i].checked = checkBox;
        }
 
        return true;
    }
</script>
 
<form id="inbox" action="" method="POST">
<input type="checkbox" name="message[]" id="message[]" value="1" /> Welcome to this messageboard<br />
<input type="checkbox" name="message[]" id="message[]" value="2" /> Hi there, can I ask a question?<br />
<input type="checkbox" name="message[]" id="message[]" value="3" /> Could you do me a favour?<br />
<input type="checkbox" name="message[]" id="message[]" value="4" /> My login info<br />
<input type="checkbox" name="message[]" id="message[]" value="5" /> Example script<br />
<input type="checkbox" name="message[]" id="message[]" value="6" /> Explain plz...<br />
<input type="checkbox" name="message[]" id="message[]" value="7" /> You are an idiot, you know that<br />
<input type="checkbox" name="message[]" id="message[]" value="8" /> Your account has been suspended<br />
</form>
 
<br />
<br />
 
<input type="checkbox" name="checkAllCont" id="checkAllCont" onClick="return checkAll('inbox', 'checkAllCont');"/> Check All