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0806.html
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0806.html
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<HTML>
<HEAD>
<TITLE>Tchatshke Gulch - The world's smallest on-line marketplace</TITLE>
<SCRIPT>
var timerID;
// Bid prototype object
function Bid (name, max_amount, curr_amount) {
this.name = name;
this.max_amount = max_amount;
this.curr_amount = curr_amount;
}
Bid.prototype.toString = function(){
return this.name + ": current bid: " + this.curr_amount + " Max amount (proxy bidding): " + this.max_amount;
}
Bid.prototype.valueOf = function() { return this.curr_amount;}
// Auction prototype object
function Auction (lot_num, desc, start_bid, increment){
this.lot_num = lot_num;
this.desc = desc;
this.start_bid = start_bid;
this.increment = increment;
this.bidArray = new Array();
this.status = "";
this.currBid = start_bid;
}
function display_Bids (){
var displayStr = "";
for (var i = 0; i < this.bidArray.length; i++){
displayStr += this.bidArray[i].toString() + "\r\n";
}
window.document.resultForm.txtBids.value = displayStr;
}
function update_Bids () {
if (this.bidArray.length > 0) {
var winnerIndex = 0;
for (var i = 0; i < this.bidArray.length; i++){
if (Number(this.bidArray[i].curr_amount) < Number(this.currBid)){
if (Number(this.bidArray[i].max_amount) >= Number(this.currBid) + Number(this.increment)){
this.bidArray[i].curr_amount = Number(this.currBid) + Number(this.increment);
this.currBid = this.bidArray[i].curr_amount;
winnerIndex = i;
}
}
}
window.document.resultForm.txtCurrentHighBid.value = "Current High Bid: " + this.currBid + "\r\n" +
this.bidArray[winnerIndex].toString();
this.displayBids();
}
}
function end_Auction () {
clearInterval(timerID);
var winnerIndex = 0;
var highBid = 0;
for (var i = 0; i < this.bidArray.length; i++){
if (Number(this.bidArray[i].max_amount) > Number(highBid)){
highBid = Number(this.bidArray[i].max_amount);
winnerIndex = i;
}
}
var runnerUpIndex = 0;
var runnerUpBid = 0;
for (var i = 0; i < this.bidArray.length; i++){
if (Number(this.bidArray[i].max_amount) > Number(runnerUpBid) && (i != winnerIndex)){
// runnerUpBid = Number(this.bidArray[i].max_amount);
runnerUpIndex = i;
}
}
var winningBid = Math.min(Number(this.bidArray[runnerUpIndex].max_amount) +
Number(this.increment), Number(this.bidArray[winnerIndex].max_amount));
this.bidArray[winnerIndex].curr_amount = winningBid;
window.document.resultForm.txtCurrentHighBid.value = "The winner is " +
this.bidArray[winnerIndex].name + "\r\n" +
"Detail: " + this.bidArray[winnerIndex].toString();
this.displayBids();
window.document.createForm.btnCreateAuction.disabled = false;
}
function make_Bid (name, max_amount, curr_Bid) {
var thisBid = new Bid (name, max_amount, curr_Bid);
this.bidArray [this.bidArray.length] = thisBid;
}
Auction.prototype.displayBids = display_Bids;
Auction.prototype.updateBids = update_Bids;
Auction.prototype.endAuction = end_Auction;
Auction.prototype.makeBid = make_Bid;
Auction.prototype.toString = function(){
return this.desc;
}
window.status = "No auction active!";
var theAuction;
function createAuction(lot, desc, startBid, inc) {
if (lot == "" || desc == "" || startBid == "" || inc == "" ) {
alert ("You are missing a required value!");
}
else {
theAuction = new Auction (lot, desc, startBid, inc);
window.status = theAuction + " Auction is active!";
window.document.createForm.btnCreateAuction.disabled = true;
var displayStr = "Auction Active! Lot Number " + lot + "\r\n" +
"Description: " + desc + "\r\n" +
"Starting Bid: " + startBid + "\r\n" +
"Bidding Increment: " + inc + "\r\n";
window.document.resultForm.txtAuctionStatus.value = displayStr;
window.document.resultForm.txtCurrentHighBid.value = "";
window.document.resultForm.txtBids.value = "";
timerID = setInterval("theAuction.updateBids()", 1000);
}
}
function placeBid (name, max_value){
if (theAuction == undefined) {
alert ("You must first create an auction before bids can be placed!");
return;
}
if (name == "" || max_value == "" ) {
alert ("You must enter your name and your highest bid!");
return;
}
if (Number(max_value) < Number(theAuction.start_bid)) {
alert ("Sorry, bid less than minimum. Please try again!");
return;
}
if (Number(max_value) < Number(theAuction.currBid) + Number(theAuction.increment)){
alert ("Sorry, your bid is less than the current bid " + theAuction.currBid +
" plus the auction increment amount " + theAuction.increment + ". Please try again!");
return;
}
var curr_Bid = Number(theAuction.currBid) + Number(theAuction.increment);
theAuction.currBid = curr_Bid;
theAuction.makeBid (name, max_value, curr_Bid);
window.document.bidForm.txtName.value = "";
window.document.bidForm.txtMaxBid.value = "";
window.document.resultForm.txtCurrentHighBid.value = "Current High Bid: " + curr_Bid + "[" + name + "]\r\n" +
"Note that this does not reflect proxy bidding and maximum bids submitted. "+ "\r\n" +
"Click Close Auction to determine the winner.";
}
</SCRIPT>
</HEAD>
<BODY bgcolor="#FFFFFF" link="#0000FF">
<H1>Tchatshke Gulch</H1>
<H3>World's smallest on-line marketplace<BR></H3>
<H4>New and improved, featuring automatic bid updating!</H4>
<! -- Outer table -->
<TABLE>
<TR><TD>
<! -- table and form for creating the auction -->
<form name="createForm">
<TABLE cellspacing=8>
<TR><TD>Enter lot number:</TD><TD><input type=text name="txtLotNum"></TD></TR>
<TR><TD>Enter description:</TD><TD><input type=text name="txtDesc"></TD></TR>
<TR><TD>Enter starting bid:</TD><TD><input type=text name="txtStartBid"></TD></TR>
<TR><TD>Enter bid increment:</TD><TD><input type=text name="txtIncrement"></TD></TR>
<TR><TD></TD><TD><input type=button name="btnCreateAuction" value="Create Auction" onClick="createAuction(txtLotNum.value,
txtDesc.value, txtStartBid.value, txtIncrement.value);"></TD></TR>
</TABLE>
</form>
<! -- end of table and form for creating the auction -->
</TD><TD>
<!-- bid table -->
<form name="bidForm">
<TABLE cellspacing=8>
<TR><TD>Enter your name:</TD><TD><input type=text name="txtName"></TD></TR>
<TR><TD>Enter maximum bid:</TD><TD><input type=text name="txtMaxBid"></TD></TR>
<TR><TD></TD><TD><input type=button value="Place Bid"
onClick="placeBid(txtName.value, txtMaxBid.value);"></TD></TR>
</TABLE>
</form>
<!-- end of bid table -->
</TD></TR><TR>
<TD colspan=2>
<! -- auction results table>
<form name="resultForm">
<TABLE cellspacing=8>
<TR><TD colspan=3><textarea name="txtAuctionStatus" cols=80 rows=6></textarea></TD></TR>
<TR><TD colspan=3><textarea name="txtCurrentHighBid" cols=80 rows=4></textarea></TD></TR>
<TR><TD colspan=3><textarea name="txtBids" cols=80 rows=5></textarea></TD></TR>
<TR><TD><input type=button value="Display Bids" onClick="if (theAuction != null) theAuction.displayBids();"></TD>
<TD></TD>
<TD><input type=button value="Close Auction"
onClick="if (theAuction != null) {theAuction.endAuction(); theAuction = undefined;}"></TD></TR>
</TABLE>
</form>
<! end of auction results table -->
</TD></TR>
</TABLE>
<! -- end of outer table -->
</BODY>
</HTML>