function launchshoppingcart() {
   setcookie( "order_lasturl", top.frames["MainContent"].location, "/");
}

function formrefresh() {
   setcookie( "order_error", "", "/");
   location.reload();
}

function getcookie(cookiename) {
   var allcookies = document.cookie;
   var cookiepos = allcookies.indexOf(cookiename+"=");
   
   if ( cookiepos != -1 ) {
      var cookievaluestart = cookiepos+cookiename.length+1;
      var cookievalueend = allcookies.indexOf(";",  cookievaluestart);
      if (cookievalueend == -1) cookievalueend =allcookies.length;
      var cookievalue = allcookies.substring(cookievaluestart, cookievalueend);
      cookievalue = decodeURIComponent(cookievalue);
   }
   else {
      cookievalue = -1;
   }
 
   return cookievalue;
}

function setcookie(cookiename, cookievalue, cookiepath) {
      document.cookie = cookiename+"="+encodeURIComponent(cookievalue)+"; path="+cookiepath;
}

function removeorderline(orderline) {
   var orderlines = parseInt(getcookie("orderlines"));
   var orderlinepart = "";
   var orderlinequantity = "";

   orderline = parseInt(orderline)
   if ( (orderlines >= 1)  && (orderline <=orderlines) ) {
   
      if ( orderline == orderlines ) {
         orderlinepart = "orderline" + orderline + "part";
         orderlinequantity = "orderline" + orderline + "quantity";
         setcookie( orderlinepart, "", "");
         setcookie( orderlinequantity, "", "");
         setcookie("orderlines", parseInt(getcookie("orderlines"))-1, "/");  
      }
      else {
         for ( var count = orderline; count < orderlines; count ++ ) {
            orderlinepart = "orderline" + count + "part";
            orderlinequantity = "orderline" + count + "quantity";
            orderline2part = "orderline" + (count+1) + "part";
            orderline2quantity = "orderline" + (count+1) + "quantity";
            setcookie( orderlinepart, getcookie(orderline2part), "/");
            setcookie( orderlinequantity, getcookie(orderline2quantity), "/");
         }

         orderlinepart = "orderline" + orderlines + "part";
         orderlinequantity = "orderline" + orderlines + "quantity";
         setcookie( orderlinepart, "", "");
         setcookie( orderlinequantity, "", "");
         setcookie("orderlines", parseInt(getcookie("orderlines"))-1, "/");  
      }
   }
}

function addorderline(partnumber, qtyformname) {

   if ( getcookie("orderlines") == -1 ) {
      setcookie("orderlines", 1, "/");
   }
   else {
     setcookie("orderlines", parseInt(getcookie("orderlines"))+1, "/");
   }

   var orderlines = parseInt(getcookie("orderlines"));
   var orderlinepart = "orderline" + orderlines + "part";
   var orderlinequantity = "orderline" + orderlines + "quantity";
   
   setcookie( orderlinepart, partnumber, "/");
   setcookie( orderlinequantity, document.forms[0].elements[qtyformname].value, "/");
   
}

function replaceorderlineqty(orderline, qtyformname) {
   var orderlinequantity = "";

   if ( isNaN(document.forms[0].elements[qtyformname].value) ) {
      orderlinequantity = "orderline" + orderline + "quantity";
      setcookie( orderlinequantity, 1, "/");
   }
   else {
      orderlinequantity = "orderline" + orderline + "quantity";
      setcookie( orderlinequantity, parseInt(document.forms[0].elements[qtyformname].value), "/");
   }
}

function addneworderline(partnumber, qtyformname) {
   var orderlines = 0;
   var linetoadd = 0;
   var orderlinepart = "";
   var orderlinequantity = "";
   var foundline = false;
   var searchpart = "";
   var searchquantity = 0;

   // Check to make sure the quantity field contains a valid number
   if ( isNaN(document.forms[0].elements[qtyformname].value) ) {
      document.forms[0].elements[qtyformname].value = 1
   }
 
   // Now lets find, update or create the cookie
   if ( getcookie("orderlines") == -1 ) {

      setcookie("orderlines", 1, "/");
      linetoadd = 1
      orderlinepart = "orderline" + linetoadd + "part";
      orderlinequantity = "orderline" + linetoadd + "quantity";
      setcookie( orderlinepart, partnumber, "/");
      setcookie( orderlinequantity, parseInt(document.forms[0].elements[qtyformname].value), "/");

   }
   else {

      orderlines = parseInt(getcookie("orderlines"));
      
      if ( orderlines > 0 ) {
   
         for ( var count = 1; count <= orderlines; count ++ ) {
            orderlinepart = "orderline" + count + "part";
            orderlinequantity = "orderline" + count + "quantity";
            searchpart = getcookie(orderlinepart);
            if ( searchpart == partnumber ) {
               foundline = true;
               linetoadd = count;
               searchquantity = parseInt(getcookie(orderlinequantity));
            }
         }
         
         if ( foundline ) {
            orderlinepart = "orderline" + linetoadd + "part";
            orderlinequantity = "orderline" + linetoadd + "quantity";
            setcookie( orderlinepart, partnumber, "/");
            setcookie( orderlinequantity, parseInt(document.forms[0].elements[qtyformname].value) + searchquantity, "/");
         }
         else {
         
            if ( orderlines < 10 ) {
               setcookie("orderlines", parseInt(getcookie("orderlines"))+1, "/");
               linetoadd = parseInt(getcookie("orderlines"));
               orderlinepart = "orderline" + linetoadd + "part";
               orderlinequantity = "orderline" + linetoadd + "quantity";
               setcookie( orderlinepart, partnumber, "/");
               setcookie( orderlinequantity, parseInt(document.forms[0].elements[qtyformname].value), "/");
            }
            else { 
               alert("You can only have a maximum of 10 lines to an order");
            }
         }
      }
      else {
         setcookie("orderlines", 1, "/");
         linetoadd = parseInt(getcookie("orderlines"));
         orderlinepart = "orderline" + linetoadd + "part";
         orderlinequantity = "orderline" + linetoadd + "quantity";
         setcookie( orderlinepart, partnumber, "/");
         setcookie( orderlinequantity, document.forms[0].elements[qtyformname].value, "/");
      }      
   }
}