function create_form()
{
	var my_form = document.createElement("FORM");
	document.body.appendChild(my_form);
	my_form.method = "POST";
	return my_form;
}

function create_field(form, name, value)
{
	var field = document.createElement("INPUT");
	field.setAttribute('name', name);
	field.setAttribute("type", "hidden");
	form.appendChild(field);
	field.value = value;
	return field;
}

function smart_link(url, sid)
{
 var my_form = create_form();
 create_field(my_form, "sid", sid);
 my_form.action= url;
 my_form.submit();
}