21points.js

一个用js编写的21点游戏

// JavaScript Document<SCRIPT LANGUAGE="JavaScript">
function random(maxValue)
{
 day = new Date();
 hour = day.getHours();
 min = day.getMinutes();
 sec = day.getSeconds();
 return (((hour + 1) * (min + 1) * sec) % maxValue) + 1;
}

function pickSuit()

{
 suit = random(4);
 if(suit == 1)
  return "Spades";
 if(suit == 2)
  return "Clubs";
 if(suit == 3)
  return "Diamonds";
 return "Hearts";
}

function cardName(card)
{
if(card == 1)
  return "Ace";
if(card == 11)
  return "Jack";
if(card == 12)
  return "Queen";
if(card == 13)
  return "King";
return "" + card;
}

function cardValue(card)
{
if(card == 1)
 return 11;
if(card > 10)
 return 10;
return card;
}

function PickACard(strWho)
{
card = random(13);
suit = pickSuit();
//alert(strWho + " picked the " + cardName(card) + " of " + suit);
return cardValue(card);
}

function NewHand(form)
{
  form.dealer.value = 0;
  form.you.value = 0;
  form.dealer.value = eval(form.dealer.value) + PickACard("Dealer");
  form.you.value = eval(form.you.value) + PickACard("You");
}
function Dealer(form)
{
while(form.dealer.value < 17)
  {
   form.dealer.value = eval(form.dealer.value) + PickACard("Dealer");
  }
}

function User(form)
{
form.you.value = eval(form.you.value) + PickACard("You");
if(form.you.value > 21)
{
alert("不好意思，你爆了!");
}
}

function LookAtHands(form)
{
if(form.dealer.value > 21)
{
alert("庄家爆了，你赢!");
}
else   if(form.you.value > form.dealer.value)
{
alert("你赢了!");
}
else
if(form.dealer.value == form.you.value)
{
alert("平!");
}
else
{
alert("庄家赢了!");
}
}
//-->
</SCRIPT>
<CENTER><H2>21点</H2></CENTER>
<CENTER>单击“重新发牌”开始</CENTER>
<HR>
<CENTER>
<FORM>
<TABLE BORDER=3>
<TR>
<TD>庄家有</TD>
<TD><INPUT TYPE=TEXT NAME=dealer>点</TD>
</TR>
<TR>
<TD>你有</TD>
<TD><INPUT TYPE=TEXT NAME=you>点</TD>
</TR>
</TABLE>
<P>
<CENTER>
<INPUT TYPE=BUTTON VALUE="再要一张" onClick=User(this.form)>
<INPUT TYPE=BUTTON VALUE="亮牌" onClick="Dealer(this.form);LookAtHands(this.form);">
<INPUT TYPE=BUTTON VALUE="重新发牌" onClick=NewHand(this.form)>
</CENTER>