<!--
//this was ok w shipping funs
function preload(){
	var img1=new Image;
	img1.src="../img/cart/arrow_grn_over.gif";
	var img2=new Image;
	img2.src="../img/cart/btn_mod_over.gif";
	var img3=new Image;
	img3.src="../img/cart/btn_rem_over.gif";
}
function swap(n,action) {
	var img=document.getElementById(n);
	if (action==1) {
		img.src="../img/cart/arrow_grn_over.gif";
	} else {
		img.src="../img/cart/arrow_grn.gif";
	}
}
function swapcartbtn(n,nm,action) {
	var img=document.getElementById(n);
	var btn;
	if (action==1) {
		img.src="../img/cart/btn_"+nm+"_over.gif";
	} else {
		img.src="../img/cart/btn_"+nm+".gif";
	}
}
function calc(subtotal,numbooks,numdvds) {
	var zip=document.getElementById("zip").value;
	var shiptype=document.getElementById("shiptype").value;
	var tax=puttax(zip,subtotal);
	var shipamt=putship(shiptype,numbooks,numdvds);
	var total=new Number(subtotal+tax+shipamt);
	var txtTotal=document.getElementById("mtotal");
	txtTotal.innerHTML=total.toFixed(2);
}
function putship(shiptype,subtotal) {
	var shipamt=new Array(0,0,7,7,10);
	var amt=shipamt[shiptype];
	var total=subtotal+amt;
	var txtShipamt=document.getElementById("shipamt");
	txtShipamt.innerHTML=amt.toFixed(2);
	var txtTotal=document.getElementById("mtotal");
	txtTotal.innerHTML="$ "+total.toFixed(2);
	var ishiptype=document.getElementById("ishiptype");
	ishiptype.value=shiptype;
	return amt;
}
function puttax(zip,subtotal) {
	var tax=0;
	var sttnum=zip.substr(0,1);
	if (sttnum=="9"){
		tax=subtotal*.0825;
	}
	var num=new Number(tax);
	document.getElementById("txtTax").value=num.toFixed(2);
	return tax;
}
function valid_mod(frmid) {
	var frm=document.getElementById(frmid);
	var n=frm.elements[2].value;
	if (isNaN(n)){
		alert("Please enter a number for quantity");
		return false;
	} else {
		return true;
	}
}
//-->