跪求JavaScript解释

来源：互联网发布：php的ext目录编辑：程序博客网时间：2024/04/28 14:53

<html>
<head></head>
<script>
function ShowMenu(bMenu) {
document.all.idFinder.style.display = (bMenu) ? "none" : "block"
document.all.idMenu.style.display = (bMenu) ? "block" : "none"
idML.className = (bMenu) ? "cOn" : "cOff"
idRL.className = (bMenu) ? "cOff" : "cOn"
return false
}
</script>
<style>

</style>
<script>

</script>

-->
</style>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var timerRunning = false;
var timezone = "Greenwich Mean Time";
var adjust = 0;

function timeCheck(tzone, diff) {
if (timerRunning) {
clearTimeout(updatetime);
timerRunning = false; }
gmtOffset=eval(diff+adjust);
timezone = tzone;
checkDateTime();
}

function checkDateTime () {
var today = new Date();
var year = today.getYear() + 1900;
var month = today.getMonth()+1;
var date = today.getDate();
var day = today.getDay();
var hour = today.getHours();
var minute = today.getMinutes();
var second = today.getSeconds();

var lastSat = date - (day+1);
while (lastSat < 32) lastSat+=7;
if (lastSat > 31) lastSat+=-7;
var firstSat = date - (day+1);
while (firstSat > 0) firstSat+=-7;
if (firstSat < 1) firstSat+=7;
if ((((month == 4) && (date >= firstSat)) || month > 4) &&
(month < 11 || ((month == 10) && day <= lastSat))) adjust += 60;
yourOffset = (new Date()).getTimezoneOffset();
yourOffset = yourOffset + adjust;

var xx = navigator.appName
var xy = navigator.appVersion;
xy = xy.substring(0,1);
if ((xy == 4) && (xx == "Netscape")) yourOffset = yourOffset+adjust;
if ((((month == 4) && (date > 20)) || month > 4) && (month < 11 || ((month == 10) &&
day < 30))) adjust -= 60;

ourDifference = eval(gmtOffset - yourOffset);
var half = eval(ourDifference % 60);
ourDifference = Math.round(ourDifference / 60);
hour = eval(hour - ourDifference);
var m = new Array("",
"Jan","Feb","Mar",
"Apr","May","Jun",
"Jul","Aug","Sept",
"Oct","Nov","Dec");
var leap = eval(year % 4);

if ((half == -30) || (half == 30)) minute += 30;
if (minute > 59) minute -= 60, hour++;
if (minute < 0) minute += 60, hour--;
if (hour > 23) hour -= 24, date += 1;
if (((month == 4) || (month == 6) ||
(month == 9) || (month == 11)) && (date==31)) date = 1, month ++;
if (((month == 2) && (date > 28)) && (leap != 0)) date = 1, month ++;
if ((month == 2) && (date > 29)) date = 1, month++;
if (hour < 0) hour += 24, date --;
if ((date == 32) && (month == 12)) month = m[1], date = 1, year++;
if (date == 32) date = 1, month++;
if ((date < 1) && (month == 1)) month= m[12], date = 31, year--;
if (date < 1) date = 31, month --;
if (((month == 4) || (month == 6) ||
(month== 9) || (month == 11)) && (date == 31)) date = 30;
if ((month == 2) && (date > 28)) date = 29;
if (((month == 2) && (date > 28)) && (leap != 0)) date=28;
for (i=1; i<13; i++) {
if (month == i) {
month = m[i]; break;
}
}

var dateTime = hour;
dateTime = ((dateTime < 10) ? "0":"") + dateTime;
dateTime = " " + dateTime;
dateTime += ((minute < 10) ? ":0" : ":") + minute;
dateTime += ((second < 10) ? ":0" : ":") + second;
dateTime += (hour >= 12) ? " PM, " : " AM, ";
dateTime += month + " " + date + ", " + year;

document.clock.zonetime.value = dateTime;
document.clock.zonename.value = timezone;
updatetime=setTimeout("checkDateTime()", 900);
timerRunning = true;
}
// End -->
</SCRIPT>

<body>
<table CELLPADDING="0" CELLSPACING="0" BORDER="0" width="509">
<tr>
    <td WIDTH="10"></td>
    <td valign="top" WIDTH="499" ID="article"><p class="start" STYLE="text-align: left"><font
    size="+2" style="font-weight:bold;font-size: 14pt"><b>看谁围的框子多？</b></font></p>
    <p>这是一个双人游戏，蓝色的先行，看谁围的框子多，谁就赢。</p>
    <p STYLE="margin-top: 5pt"><script>
/* DHTML Dots is copyright 1998 insideDHTML.com, LLC. All rights reserved.
     DHTML Dots cannot be reproduced in any manner without prior consent from insideDHTML.com */

var scale= 25
var size = 5

var totalSize = ((size+1)*scale) + 6
var cache = new Object()
var move=0,point=0
var player = true

function initCache() {
    cache.x = 0
    cache.y = 0
    cache.red = 0
    cache.navy = 0
    move=0,point=0
}

function updateScore() {
    document.all.red.innerText = cache.red
    document.all.navy.innerText = cache.navy
    if ((cache.red+cache.navy)==((size-1)*(size-1))) {
      board.onclick = null
      document.all.message.innerText = "Game Over!"
    }

}

function fillPos(x,y) {
    document.all.board.insertAdjacentHTML("beforeEnd","<DIV class=" + (player ? "p1B" : "p2B") + " ID=/"point"+point+"/">" + (player ? "N" : "R") + "</DIV>")
    var el = document.all["point"+point].style
    el.pixelTop = (y*scale)+5
    el.pixelLeft = (x*scale)+5
    el.pixelWidth = scale - 5
    el.pixelHeight = scale - 5

}

function checkBoard(x,y,dir, player) {
    var piece=0
    if ("vertical"==dir) {
      if ((x==size) || (x>1)) {
        var bPos = boardArray[x-1][y]
        var nextV = boardArray[x-1][y+1]
        if ((bPos["vertical"]) && (bPos["horizontal"]) && (nextV["horizontal"])) {
          point++
          piece++
          fillPos(x-1,y)
        }
      }
      if ((x==1) || (x<size)) {
          var nextV = boardArray[x+1][y]
          var nextH = boardArray[x][y+1]
          if ((nextV["vertical"]) && (nextH["horizontal"]) && (boardArray[x][y]["horizontal"])) {
            point++
            piece++
            fillPos(x,y)
          }
      }
    }
    else {
      if ((y==size) || (y>1)) {
        var nextV = boardArray[x+1][y-1]
        var bPos = boardArray[x][y-1]
        if ((bPos["vertical"]) && (bPos["horizontal"]) && (nextV["vertical"])) {
          point++
          piece++
          fillPos(x,y-1)
        }
      }
      if ((y==1) || (y<size)) {
        var nextV = boardArray[x+1][y]
        var nextH = boardArray[x][y+1]
        if ((nextV["vertical"]) && (nextH["horizontal"]) && (boardArray[x][y]["vertical"])) {
          point++
          piece++
          fillPos(x,y)
        }
      }
    }
    if (piece>0) {
      if (player)
       cache.navy+=piece
      else
       cache.red+=piece
      document.all.message.innerText = "Score! Go Again."
      updateScore()
      return player
    }
    else
      return !player

}

function doMouseMove() {
    if (event.srcElement.className!="dot") {
      var x = Math.floor(event.offsetX / scale)
      var y = Math.floor(event.offsetY / scale)
      var dirX = (event.offsetX % scale)
      var dirY = (event.offsetY % scale)
      if ((x<size+1) && (y<size+1) && (y>0) && (x>0)) {
        if (dirX>=dirY) {
          if (x<size) {
            line.style.pixelHeight = 5
            line.style.pixelWidth = scale - 5
            line.style.pixelTop = (y * scale)
            line.style.pixelLeft = (x * scale) + 5
            cache.direction = "horizontal"
          }
        } else
        {
          if (y<size) {
            line.style.pixelWidth = 5
            line.style.pixelHeight = scale - 5
            line.style.pixelTop = (y * scale) + 5
            line.style.pixelLeft = x * scale
            cache.direction = "vertical"
          }
        }
        cache.x = x
        cache.y = y
      }
    }

}

function doClick() {

    if (cache.x==0) return
    if (boardArray[cache.x][cache.y][cache.direction])
      document.all.message.innerText="That spot is taken! Choose again"
    else {
      document.all.board.insertAdjacentHTML("beforeEnd","<DIV class=" + (player ? "p1" : "p2") + " ID=move"+move+"></DIV>")
      var el = document.all["move"+move]
      el.style.top = line.style.top
      el.style.left = line.style.left
      el.style.width = line.style.width
      el.style.height = line.style.height
      boardArray[cache.x][cache.y][cache.direction]=true
      var nextPlayer = checkBoard(cache.x,cache.y,cache.direction, player)
      if (nextPlayer!=player) {
        player = nextPlayer
        if (player) {
          document.all.message.innerText = "Navy players turn"
          line.style.border = "1px navy solid"
        }
        else {
          document.all.message.innerText = "Red players turn"
          line.style.border = "1px red solid"
        }
      }
    }

move++
}

function buildDiv(x,y, scale) {
return ("<DIV CLASS=dot STYLE=/"top:" + (x*scale) + "; left: " + (y*scale) + "/"></DIV>")
}

var boardArray = new Object

function buildBoard() {
    initCache()
    board = ("<DIV ID=line STYLE=/"border: 1px navy solid; width: 0; height: 0/"></DIV>")
    boardArray = new Object()
    for (var x=1; x < size+1; x++) {
      boardArray[x] = new Object()
      for (var y=1; y < size+1; y++) {
        boardArray[x][y] = new Object
        boardArray[x][y]["vertical"] = false
        boardArray[x][y]["horizontal"] = false
        board+=(buildDiv(x,y, scale))
      }
    }

return board
}

function createGame() {
    size=parseInt(document.all.setSize.value)
    if (size>12)
      size=12
    if (size<3)
      size=3
    document.all.setSize.value = size
    document.all.board.innerHTML = buildBoard()
    document.all.board.onclick = doClick
    totalSize = ((size+1)*scale) + 6
    document.all.board.style.pixelWidth = totalSize
    document.all.board.style.pixelHeight = totalSize
    document.all.message.innerText = "Navy player goes first. Good Luck!"
    updateScore()
}
document.write("<DIV ID=board STYLE=/"position: relative; height: "+ totalSize + "; width:" + totalSize + "; border: 1px black solid/">" + buildBoard() + "</DIV>")
document.all.board.onmousemove = doMouseMove
document.all.board.onclick = doClick

</script> </p>
    <div STYLE="margin-left: 10pt; margin-top: 5pt"><p class="start" ID="message">Navy player
    goes first. Good Luck!</p>
    <dd><br>
      <table border="1" width="100">
        <tr>
          <td style="color: red"><b>Red</b></td>
          <td ID="red">0</td>
        </tr>
        <tr>
          <td style="color: navy"><b>Navy</b></td>
          <td ID="navy">0</td>
        </tr>
      </table>
      <p><br>
      </p>
      <table width="200">
        <tr>
          <td>游戏大小: </td>
          <td><input TYPE="Text" VALUE="5" ID="setSize" SIZE="2"></td>
        </tr>
        <tr>
          <td COLSPAN="2" align="center"><input TYPE="button" ONCLICK="createGame()"
          VALUE="New Game"></td>
        </tr>
      </table> <p CLASS="copyright">　</p>
    </dd>
    </div></td>
</tr>
</table>
</body>
</html>