Sending a form through Javascript IE7 Problem

I am开发者_如何学编程 using the following code to send a form:

<script type="text/javascript">
window.onload = function() { document.form1.submit(); }
</script>

The code for the form is below:

<div id="donationWorldPay"><form id="form1" name="donation_form1" action="https://secure.wp3.rbsworldpay.com/wcc/purchase" method="post" target="_blank" >
<input type="hidden" name="instId" value="11111" />
        <input type="hidden" name="cartId" value="1" />
        <input type="hidden" name="currency" value="GBP" />
        <input type="hidden" name="amount" value="'.$amount.'" />
        <input type="hidden" name="desc" value="'.$donationType.' Gift Aid ='.$giftAid.'" />
        </form></div>

Its works in FF, Safari, chrome and even IE8. But can't seem to get it working in IE7. The form sends to the right page in ie7 but no $_POST values are sent.

Thanks in Advance

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Try changing the code to:

document.forms["form1"].submit();

Assuming form1 is the name of the form it should work.

If still no luck please answer the questions in my comment on your original question.