Field Calculation

[116]

I have attempted to get the value of one field (in a databases
resultssection) and have it add '1' to the value to enter in a form field
onload. Can someone tell me what I am missing:

<script type="text/javascript">
function son()
{
with (document.FrontPage_Form1)
{ SON_SON.value = +MaxOfShop_Order.value + +"1";
}
/* Note the extra + operators. */
}
</script>


Thanks
David