function update_product_option_form()
	{
	var number_of_options = document.product_option_form.number_options.value;
	var value_fields = "<br />";
	
	for(a=0; a<number_of_options; a++)
		{
		value_fields = value_fields + (a+1) + ". <input type='text' name='value_field[]' /><br /><br />";
		}
		
	document.getElementById("product_option_values").innerHTML=value_fields;
	}