Front desk manager for shopping cart-only once with Server (ii)

Program | server | Shopping Cart | interactive cart.js

Please save it as cart.js and put it in the same directory as the previous part of the HTML

//------------------------------------------------------------------------------
//
File Name:cart.js
//
Description: JavaScript function library for shopping cart foreground
//
function List:on_cancel (Txtamount, txtsum)----Cancel the item
On_update ()----Update quantity
On_del ()----Delete all
Updatedate ()----Update form display
Round ()----rounded to the specified number of decimal places
//
Aurthor:liuyunpeng
//
Date:2000/09/03
//
HISTORY:2000/09/03 version 1.0
//
//------------------------------------------------------------------------------


----------------code begin here------------------------------------------

function On_cancel (Txtamount, Txtsum)
{
Txtamount.value = 0;
Txtsum.value = 0;
UpdateData ();
}

Update form Display
function UpdateData ()
{
var m_aamount = new Array ();
var m_aprice = new Array ();
var m_adiscount = new Array ();
var m_asum = new Array ();
var m_numtotal = 0;
var I, J, K, M;
i = 0;
j = 0;
k = 0;
m = 0;

Ask for quantity
for (i = 0; i < Document.frmorder. elements. length; i + +)
{
if (frmorder.elements [i].name.substring (0, 9) = = "Txtamount")
{
M_AAMOUNT[J] = frmorder.elements [I].value;
j + +;
}
if (frmorder.elements [i].name.substring (0) = = "Txtticketprice")
{

M_aprice[k] = Round (Frmorder.elements[i].value, 2);
K + +;
}
if (frmorder.elements [i].name.substring (0) = = "Hidticketdisco")
{
M_ADISCOUNT[M] = Frmorder.elements[i].value;
m + +;
}
}

for (i = 0; i < K; i + +)
{
M_asum[i] = Round (m_aprice[i] * m_aamount[i] * m_adiscount[i]/100, 2);

}


Update Form
j = 0;
for (i = 0; i < Document.frmorder. elements. length; i + +)
{
if (frmorder.elements [i].name.substring (0, 6) = = "Txtsum")
{
frmorder.elements [i].value = M_asum[j];
M_numtotal = Round (M_numtotal + m_asum[j], 2);
j + +;
}

}

Document.frmorder. txttotal. value = M_numtotal;

return 0;
}

Number of updates
function On_update ()
{

if (Document.frmorder. btnupdate. Value = = "Modified quantity")
{
Document.frmorder. btnupdate. Value = "Number of updates"
for (Var i=0 i < frmOrder.elements.length; i++)
{
if (frmorder.elements [i].name.substring (0, 9) = = "Txtamount")
{

frmorder.elements [i].disabled = false;
Frmorder.elements[i].style.borderstyle = "Ridge";
Document.frmorder. btnbuy. Disabled = true;
Document.frmorder. btncancel. Disabled = true;
Document.frmorder. btncontinue. Disabled = true;
Document.frmorder. Btndel. Disabled =true;
}

}
}
Else
{
Alert (Document.frmorder. btnupdate. Value);
Document.frmorder. btnupdate. Value = "Modified Quantity"
var j = 0;
var m_aprice = new Array ();
var m_aamount = new Array ();
for (Var i=0 i < frmOrder.elements.length; i++)
{
if (frmorder.elements [i].name.substring (0, 9) = = "Txtamount")
{

frmorder.elements [i].disabled = true;
Frmorder.elements[i]