function transferprice(form) {
    fields="";

	for (i = 0; i < form.elements.length; i++)
	{
		if (form.elements[i].type == "checkbox")
		{
			if (form.elements[i].checked == true)
				fields = fields + form.elements[i].name + "=" + form.elements[i].value;
		} else {
			fields = fields + form.elements[i].name + "=" + form.elements[i].value;
		}

		if (i < form.elements.length - 1) fields = fields + "&";
	}

	document.getElementById('ajaxFrame').src="http://www.faroprivatetaxis.co.uk/calc.php?" + fields;
}