var order = new Object();  // object to store order items in
var root  = new Object();  // selection criteria
var on    = true;
var off   = false;
var cntr  = 0;             // items in object
var opts  = 0;             // number of options to allow
var shpr  = function (wt) {return 0;} // what to charge for shipping;
var stxt  = "";            // shipping text
var spos  = -1;            // shipping position selector
var ttax  = 0;             // percent for taxes
var ttxt  = "0";           // tax text
var tpos  = -1;            // tax position selector
var tamt=0,tqty=0,twgt=0,wgt=0,thnd=0;  // totals

root.hamt = 0;     // amount, below which, handling charge applies
root.hand = 0;     // handling charge for orders less than hamt
root.shp  = on;    // shipping selection line
root.tax  = on;    // tax selection line
// place for user-specific options
root.xx_can  = "http://www.linkungfu.com/products.php"; // place for PayPal cancel return path
root.xx_cur  = "USD"; // enter default currency code (or null)
root.xx_id   = "info@linkungfu.com"; // PayPal ID info@linkungfu.com
root.xx_img  = ""; // image URL
root.xx_lc   = "US"; // enter default country code (or null)
root.xx_ret  = "http://www.linkungfu.com/thankyou.php"; // place for PayPal return path
root.xx_sty  = "Linkungfu"; // place for PayPal page style  Linkungfu
root.xx_xtra = ""; // place for other PayPal commands

function CalcRoot () {  // calc root stuff
  if (root.shp) spos=0; 
  if (root.tax) tpos=0;
}


function resetform () {  
  	d = document.orderf;
	cntr = 0; 
	shpr = function (wt) {return 0;} 
	tamt=0; 
	tqty=0; 
	twgt=0; 
	thnd=0; 
	d.sub.value = 0.00; 
	d.tot.value = 0.00; 
	d.tax.value = 0.00; 
	d.shp.value = 0.00; 
	if (root.shp) spos = 0; 
	if (root.tax) tpos = 0; 
	d.reset();
}



function DispTots () {  // display totals on the page
var tmp, d, sh, shf;
  d = document.orderf;
  d.sub.value = Dollar (tamt);
  d.wgt.value = twgt;
  shpr = function (wt) {return 0;}  // zap it
  if (root.shp) {
	if (twgt == 1) {
  		sh = 6;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 2) {
  		sh = 8;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 3) {
  		sh = 10;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 4) {
  		sh = 13;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 5) {
  		sh = 15;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 6) {
  		sh = 17;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 7) {
  		sh = 19;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 8) {
  		sh = 21;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 9) {
  		sh = 23;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt == 10) {
  		sh = 25;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else if (twgt > 10) {
  		sh = 30;
  	 	d.shp.value = Dollar (sh);
  		shf = sh;
  	} else  {
  	 	d.shp.value = Dollar (0);
  		shf = 0;
  	}
  shpr = function (shf) {return shf;}
  }
  tmp = tamt * ttax/100;
  if (root.tax) d.tax.value = Dollar (tmp);
  thnd = 0;                    // assume the worst;
//  if (d.hnd) d.hnd.value = "0.00";
//  if (tamt*1.0 < root.hamt) {  // calculate handling charge
//      thnd = root.hand;        // figure it out
//      if (d.hnd) d.hnd.value = Dollar (thnd);
//  }
  // d.tot.value = Dollar (tamt + shf + tmp);
//  d.tot.value = Dollar (tamt + shpr (twgt) + tmp + thnd);
  d.tot.value = Dollar (tamt + shpr (shf) + tmp);
}

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 (".");  // should be one, but OK if not
  if (pos > 0) str = str.substring (rnd, pos + 3);
  return str;               // return valid string
}

function GetOrder (id, des, amt, wgt) {  // get all ordered items
var i,nr,val,qty,pos;
var op = new Array ();    // accumulate options here
  tamt=0,tqty=0,twgt=0;   // zero totals
  nr = id.substring (2);  // get number part of ID
  qty = document.orderf["qty" + nr].value;  // get qty
  if (isNaN (qty)) {      // test entry
    alert ("That is not a valid number!  Try again.");
    return;
  }
//  for (i=1; i<=opts; i++) {     // see if any options
//    if (document.orderf["op" + i + nr]) {
//      val = document.orderf["op" + i + nr].value;  // get option
//      op[i] = val;
//      pos  = val.indexOf ("+"); // price increment?
//      if (pos > 0) amt = amt + val.substring (pos + 1)*1.0;
//      pos  = val.indexOf ("%"); // percent change?
//      if (pos > 0) amt = amt + (amt * val.substring (pos + 1)/100.0);
//    }
//    else op[i] = "";
//  }
  if (qty == "0" || qty == "" || qty == " ") {
  	document.orderf["prc" + nr].value = "0.00";  
  	document.orderf["toz" + nr].value = "0"; 
  	wgt = 0;
  } else {
  	document.orderf["prc" + nr].value = Dollar (qty * amt);
  	document.orderf["toz" + nr].value = qty * wgt;
  }
  if (cntr == 0) order = new Object (); // zap object
  cntr = cntr + 1;               // bump counter so no zap next time
  order[id] = new Object ();     // create new entry
//  for (i=1; i<=opts; i++)        // load options
//    if (op[i] != "") des = des + ", OP" + i + "=" + op[i];
  order[id].des = des;           // load up values
  order[id].amt = Dollar (amt);
  order[id].qty = qty;
  if (wgt) order[id].wgt = wgt;
    else order[id].wgt = 0;
  for (i in order) {             // calc totals we might use
    qty = order[i].qty*1.0;
    tamt = tamt + order[i].amt * qty;  // total amount
    tqty = tqty + qty;                 // total quantity
    twgt = twgt + order[i].wgt; // * qty;  // total ounces
  }
  // twgt = Math.floor ((twgt + 15.99)/16.0);  // get pounds
  DispTots ();                         // calc totals
}

function SendCart () {  // send the cart to PayPal
var frst = true;  // 1st pass thru items.
var winpar = "scrollbars," + "location,resizable,status";
// var winpar = "width=710,height=390,scrollbars," +
             "location,resizable,status";
var strn   = "https://www.paypal.com/cgi-bin/webscr?cmd=_cart" +
             "&upload=1" +
             "&business=" + root.xx_id + root.xx_xtra;
var i,j=0,des;
  if (root.xx_cur.length > 0)
    strn = strn + "&currency_code=" + root.xx_cur;
  if (root.xx_lc.length > 0)
    strn = strn + "&lc=" + root.xx_lc;
  if (root.xx_can.length > 0)
    strn = strn + "&cancel_return=" + root.xx_can;
  if (root.xx_ret.length > 0)
    strn = strn + "&return=" + root.xx_ret;
  if (root.xx_sty.length > 0)
    strn = strn + "&page_style=" + root.xx_sty;
  if (root.xx_img.length > 0)
    strn = strn + "&image_url=" + root.xx_img;
  if (tpos > 0) strn = strn + "&tax_cart=" + Dollar (tamt*ttax/100);
  for (i in order) {  // send all valid data
    if (order[i].qty > 0) {
      j = j + 1;
      des = order[i].des;
      if (j == 1) {  // put in descriptions for 1st item
        // des = des + ", SHP=" + stxt;
        des = des + ", TAX=" + ttxt;
        strn = strn + "&handling_cart=" + Dollar (thnd);
      }
      strn = strn + "&item_name_"    + j + "=" + escape (des) +
                    "&item_number_"  + j + "=" + i +
                    "&quantity_"     + j + "=" + order[i].qty +
                    "&amount_"       + j + "=" + order[i].amt;
      if (spos >= 0) {  // there is some shipping activity
        if (frst) {     // first time thru
          strn = strn + "&shipping_" + j + "=" + Dollar (document.orderf.shp.value);
        } else {        // every other time thru
          strn = strn + "&shipping_" + j + "=0";
        }
      }
      frst = false;
    }
  }
  if (j > 0) window.open (strn, "paypal", winpar);
}

function SetShp (obj) {  // set shipping on user selection
  // shpr = 0;
  shpr = function (wt) {return 0;}  // zap it
  spos = 5;  // which option selected
  stxt = "";
  // shpr = function (wt) {return 0;}  // zap it
  // spos = obj.selectedIndex;  // which option selected
  // stxt = obj.options[spos].text;
  // set various shipping functions.
  if (spos == 1) shpr = function (wt) {return 0;}
  if (spos == 2) shpr = function (wt) {return 4;}
  if (spos == 3) shpr = function (wt) {return 10;}
  if (spos == 4) shpr = function (wt) {return wt * 2.50;}
  DispTots ();
}

function SetTax (obj) {
  tpos = obj.selectedIndex;  // which option selected
  ttxt = obj.options[tpos].text;
  ttax = obj.options[tpos].value * 1.0;
  d = document.orderf;
  if (d.sub.value == 0){
  	d.SUB = Dollar( 0 );
  	d.tot = Dollar( 0 );
  	return false;
  }
  DispTots ();
}