How do I add a value into an input field

I need to put a cookie value into a form input field using Javascript.

The form is written in php and I have no way to change the code or change the name of the input field.

I have a Cookie function that gets the cookie (get_Cookie). the Cookie name is “Referredby”.

The form name is “editform” and the input field name is “FormField[2][32]”

Would this be the correct way to put the value of the cookie into the form field?

[CODE]<script type=”text/javascript”>
function putcookie() {
var refer = ( get_Cookie( ‘Referredby’ ) );
document.forms[“editform”].elements[“FormField[2]”][32] = refer;
}
</script>[/CODE]

Thanks for your help

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