var ValidCat = false
function orderfill() {
		
	var s = document.getElementById("catSel")
	var t = document.getElementById("mailTxt")
	var tupper = t.value.toUpperCase()
	ValidCat = true
	switch  (s.options[s.selectedIndex].value) {
		case "greeting" : ValidCat = false
			break
		case "order_payment" : 
		case "order_shipping" :
			//if order number is not already present append it to the bottom
				if (tupper.indexOf("ORDER NUMBER") < 0) {
			    t.value = t.value + "\n" + "Order Number: "
			}
			break
	}	
	
}