var discnt = 0;   // no default percent discount
var coupons = new Array (
	// place to put coupon codes
	"coup1", // 1st coupon value - comma seperated
	"coup2", // 2nd coupon value - add all you want
	"coup3"	 // 3rd coupon value
);

var coupdc  = new Array (
// place to put discounts for coupon vals
	5,10,15
);

var coupval = "(blanket)";
// what user entered as coupon code

function ChkCoup () {
// check user coupon entry
var i;discnt = 0;
	// assume the worst
	for (i=0; i<coupons.length; i++) {
		if (coupval == coupons[i]) {
			discnt = coupdc[i];
			// remember the discount amt
			alert ("Valid coupon number! \n\n" + discnt + "% discount now in effect.");
			return;
		}
	}
	alert ("'" + coupval + "'  is not a valid code!");
}

function Dollar (val) {
// force to valid dollar amount
var str,pos,rnd=0;
	if (val < .995)
		rnd = 1;
		// for old Netscape browsers
		str = escape (val*1.0 + 0.005001 + rnd);
		// float, round, escape
		pos = str.indexOf (".");
		if (pos > 0)
			str = str.substring (rnd, pos + 3);
	return str;
}

function ReadForm (obj1, discnt) {
var amt,des;
var once=obj1.once.value;
//alert("once="+once);
if (once != 99) {
	// get base amt and description
	amt = obj1.amount.value*1.0;
	des = obj1.item_name.value;
	// apply discount if applicable
	if (discnt > 0) {
		// only if discount is active
		amt = Dollar (amt - (amt * discnt/100.0));
		des = des + ", " + discnt + "% discount";
		obj1.amount.value = Dollar (amt);
		obj1.item_name.value = des;
	}
}
obj1.once.value = 99;
}

function Display_Discount(discnt) {
//alert("dis "+discnt);
	if (discnt > 0)
		document.getElementById("DISCOUNT").style.visibility="visible";
	else	document.getElementById("DISCOUNT").style.visibility="hidden";
}