var treat_amounts = new Array();
treat_amounts[0] = new Array("1 Quart", "480-640 Gallons");
treat_amounts[1] = new Array("1 Gallon", "1920-2560 Gallons");
treat_amounts[2] = new Array("1 Case (12 Quarts)", "7680 Gallons");
treat_amounts[3] = new Array("1 Case (4 Gallons)", "10,240 Gallons");
function option_onchange(classid) {
	var current_selection = product_option_value(classid);
	docObj = document.getElementById("treat_amt_value");

	if (docObj) {
		for (i in treat_amounts) {
			var option = treat_amounts[i][0];
			var treats = treat_amounts[i][1];

			if (option == current_selection) {
				docObj.innerHTML = treats;
			}
		}
	}
}