Javascript Checkbox Validation not Checking if Ticked

I've looked through a lot of the questions that people have already asked on this, but I cannot find a solution that has helped me.

I'm a beginner to programming so know little about what to do, I have four check boxes and to submit the form, you have to select at least one of them, but no message comes up and the form is able to be submitted without one of the boxes being ticked.

This is my code below:

        <tr>
       <td align="right">
        <label for="erdbeersocken"><p>Erdbeersocken<sup>*</sup>:</label>
        <br>
        <label for="armstulpen">Armstulpen<sup>*</sup>:</label>
        <br>
        <label for="cupcakes">Cupcakes<sup>*</sup>:</label>
        <br>
        <label for="babykleidung">Babykleidung<sup>*</sup>:</label>
        <br>
       </td>       
       <td align="left">
<form action="../" onsubmit="return checkCheckBoxes(this);">
    <input type="CHECKBOX" name="CHECKBOX_1" value="Erdbeersocken">
    <br>
    <input type="CHECKBOX" name="CHECKBOX_2" value="Armstulpen">
    <br>
    <input type="CHECKBOX" name="CHECKBOX_3" value="Cupcakes">
    <br>
    <input type="CHECKBOX" name="CHECKBOX_4" value="Babykleidung">
    <br>
    <input type="SUBMIT" value="Submit!">
    </td>
</tr>   
</form>

<script type="text/javascript" language="JavaScript">
<!--
function checkCheckBoxes(theForm) {
    if (
    theForm.CHECKBOX_1.checked == false or
    theForm.CHECKBOX_2.checked == false or
    theForm.CHECKBOX_3.checked == false or
    theForm.CHECKBOX_4.checked == false)
    {
        alert ('You didn\'t choose any of the checkboxes!');
        return false;
    } else {    
        return true;
    }
}
//-->
</script>

Which looks like: Text here (Checkbox here)

I'm using Notepadd++ more advanced code does not seem to work, so if anyone could help me with simplified JavaScript, I would really appreciate it. :)