I have a form that i am trying to submit after the page loads and 5 seconds has gone passed.. i have tried setTimeout but it doesnt appear to be working.. can anyone suggest why this would be the case, i have jQuery on the site but couldnt get delay() working either

<form action="" name="cartCheckout" id="cartCheckout" method="post"> 
<input type="hidden" name="action" value="checkout" />
<input type="hidden" name="save" value="1" />
<input type="hidden" name="orderID" value="<?php echo $GLOBALS['CHECKOUT_ORDERID']; ?>" />

<div class="itembox" id="step4box">
    <div id="progress">
        <ul>
        <li>Your Cart</li>
        <li>Your Details</li>
        <li class="current">Payment</li>
        <li>Confirmation</li>
        </ul>
    </div>
<div id="words" class="gothbold">Please wait while we we redirect you to<br />Paypal for a secure payment method.</div>

<a class="redirect" href="javascript:void(0)" title="Proceed to Paypal" onClick="document.cartCheckout.submit();"><span>If you aren't redirected in 5 seconds click here</span></a><br />

<a class="cancel" href="javascript:void(0)" title="Return to details" onClick="jQuery('#step4box').hide();jQuery('#step2box').show();"><span>Cancel</span></a>    
</div> 
<script type="text/javascript">
    window.onload=function(){ 
        window.setTimeout(document.cartCheckout.submit(), 5000);
    };
</script>
</form>

any help would be greatly appreciated, thanks in advance

EDIT:

changed to this via a combination of @Alex, @user824294 and this question: How Can I create A 5 second Countdown timer with jquery that ends with a logi

javascript forms settimeout
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