Hi,
you can use a form with method=post.
If you don't want the user see the form just use all <input field with type="hidden"
ex:
<form name=form1 method=post action="...
<input type="hidden" name="var1" value="val1">
<input type="hidden" name="var2" value="...
<input type="hidden" ...
</form>
Then to call the page just use javaScript document.form1.submit()
see you