这是一个简单的俄罗斯方块的源码，用JavaScript编写。它是我以前在网上偶尔发现的，觉得很有价值，于是收藏起来。遗憾的是，现在已经不知其出处了。
该脚本最大的特点(优点)是用数组存储所需数据，简化了编程，值得学习。虽没有注释，但看起来应该不难理解作者的思路。<HTML>
<HEAD>
<META NAME="Title" CONTENT="JScript Simple Tetris">
<META content="text/html; charset=gb2312" http-equiv=Content-Type>
<TITLE>俄罗斯方块</TITLE>
<style>
body {margin:0;background:black;}
td {height:20;width:20;}
#block_div {position:absolute;z-index:1;width:80;}
#table_div {position:absolute;z-index:0;width:320;}
#nblock_div {position:absolute;z-index:2;font:48 system;color:red;}
#title_div {position:absolute;left:326;top:7;font-size:9pt;color:white}
#infobar_div {position:absolute;left:396;top:416;}
#infobar2_div {position:absolute;left:396;top:480;font-size:9pt;color:white}
#infobar2_div a{color:99ccff;font:system;text-decoration:none}
</style>
<SCRIPT ID=clientEventHandlersJS LANGUAGE=javascript>
if (document.all){
var n_width = 800;
var n_height = 600;
var n_left = Math.round( screen.width/2 ) - n_width/2;
var n_top = Math.round( screen.height/2 ) - n_height/2;
var n_IncStep = 20;
var curBlcok,nextBlock;
var arr_curBlock = new Array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
var curX,curY;
var speed=1;
var maxspeed=9;
var clr_per_line=18;
var pause=0;
var gameover=0;
var colors = new Array("#999999","#0000FF","#80FFFF","#80FF80","#FFFF00","#FF8000","#FF00FF","#FF0000");
var cid;
var ncid;
var blocks = new Array("tt_O1","tt_T2","tt_Z1","tt_S1","tt_L1","tt_J1","tt_I2");
var bid;
var killedlines=0;
var tt_O1 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);
var tt_O2 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);
var tt_O3 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);
var tt_O4 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);
var tt_T1 = new Array(0,0,0,0,0,1,0,0,1,1,0,0,0,1,0,0);
var tt_T2 = new Array(0,0,0,0,0,0,0,0,1,1,1,0,0,1,0,0);
var tt_T3 = new Array(0,0,0,0,0,1,0,0,0,1,1,0,0,1,0,0);
var tt_T4 = new Array(0,0,0,0,0,1,0,0,1,1,1,0,0,0,0,0);
var tt_Z1 = new Array(0,0,0,0,1,1,0,0,0,1,1,0,0,0,0,0);
var tt_Z2 = new Array(0,0,0,0,0,0,1,0,0,1,1,0,0,1,0,0);
var tt_Z3 = new Array(0,0,0,0,0,1,1,0,0,0,1,1,0,0,0,0);
var tt_Z4 = new Array(0,0,1,0,0,1,1,0,0,1,0,0,0,0,0,0);
var tt_S1 = new Array(0,0,0,0,0,1,1,0,1,1,0,0,0,0,0,0);
var tt_S2 = new Array(0,0,0,0,0,1,0,0,0,1,1,0,0,0,1,0);
var tt_S3 = new Array(0,0,0,0,0,0,1,1,0,1,1,0,0,0,0,0);
var tt_S4 = new Array(0,1,0,0,0,1,1,0,0,0,1,0,0,0,0,0);
var tt_L1 = new Array(0,1,0,0,0,1,0,0,0,1,1,0,0,0,0,0);
var tt_L2 = new Array(0,0,0,0,0,0,1,0,1,1,1,0,0,0,0,0);
var tt_L3 = new Array(0,0,0,0,0,1,1,0,0,0,1,0,0,0,1,0);
var tt_L4 = new Array(0,0,0,0,0,1,1,1,0,1,0,0,0,0,0,0);
var tt_J1 = new Array(0,0,1,0,0,0,1,0,0,1,1,0,0,0,0,0);
var tt_J2 = new Array(0,0,0,0,1,1,1,0,0,0,1,0,0,0,0,0);
var tt_J3 = new Array(0,0,0,0,0,1,1,0,0,1,0,0,0,1,0,0);
var tt_J4 = new Array(0,0,0,0,0,1,0,0,0,1,1,1,0,0,0,0);
var tt_I1 = new Array(0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0);
var tt_I2 = new Array(0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1);
var tt_I3 = new Array(0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0);
var tt_I4 = new Array(0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1);
var table = new Array(
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1)
}
else
alert("You need IE4+ to play Tetris!")
function dimension2(row,col,num){
var i = row * num + col;
return (this[i]);
}
Array.prototype.getd = dimension2;
function ShowBlock(x,y,block_type,color){
for (var i=0;i<block_tbl.rows.length;i++){
for (var j=0;j<block_tbl.rows(i).cells.length;j++){
var d2 = i * 4 + j;
if (block_type[d2]==1){
block_tbl.rows(i).cells(j).style.background = color;
}
else{
block_tbl.rows(i).cells(j).style.background = "";
}
}
}
block_div.style.pixelLeft=x;
block_div.style.pixelTop=y;
}
function ShowBlock1(x,y,block_type,color,obj_tabID,obj_divID){
for (var i=0;i<obj_tabID.rows.length;i++){
for (var j=0;j<obj_tabID.rows(i).cells.length;j++){
var d2 = i * 4 + j;
if (block_type[d2]==1){
obj_tabID.rows(i).cells(j).style.background = color;
}
else{
obj_tabID.rows(i).cells(j).style.background = "";
}
}
}
obj_divID.style.pixelLeft=x;
obj_divID.style.pixelTop=y;
}
function Change(inc){
var type = curBlock.substr(0,4);
var num = curBlock.substr(curBlock.length-1);
num = parseInt(num) + inc;
if (num>4||num<1) num -= 4*inc;
type += num;
eval("arr_tmp = " + type + ";");
if (CanMove(curX,curY,arr_tmp)){
curBlock = type;
eval("arr_curBlock = " + curBlock + ";");
eval("ShowBlock(block_div.style.pixelLeft,block_div.style.pixelTop," + curBlock + ",colors[" + cid + "]);");
}
}
function CanMove(x,y,block){
for (i=0;i<4;i++){
for (j=0;j<4;j++){
if (block.getd(i,j,4)&table.getd(y/n_IncStep+i,x/n_IncStep+j,16)) return false;
}
}
return true;
}
function NewBlock(){
curBlock = nextBlock;
cid = ncid;
bid = Math.round(Math.random()*(blocks.length-1));
ncid = Math.round(Math.random()*(colors.length-1));
nextBlock = blocks[bid];
eval("arr_curBlock = " + curBlock + ";");
eval("ShowBlock(120,0," + curBlock + ",colors[" + cid + "]);");
eval("arr_curBlock = " + curBlock + ";");
eval("ShowBlock1(466,116," + nextBlock + ",colors[" + ncid + "],nblock_tbl,nblock_div);");
}
function SaveBlock(){
for (i=0;i<4;i++){
for (j=0;j<4;j++){
table[(curY/n_IncStep+i)*16+curX/n_IncStep+j]|=arr_curBlock[i*4+j];
if (arr_curBlock[i*4+j]==1)
if ((curY/n_IncStep+i<21)&&(curX/n_IncStep+j>1)&&(curX/n_IncStep+j<14))
table_tbl.rows(curY/n_IncStep+i).cells(curX/n_IncStep+j).style.background = colors[cid];
if (table[(curY/n_IncStep+i)*16+curX/n_IncStep+j]!=1)
table_tbl.rows(curY/n_IncStep+i).cells(curX/n_IncStep+j).style.background = "black";
}
}
}
function DelLine(line){
for(i=line;i>0;i--){
for(j=2;j<14;j++){
table[i*16+j]=table[(i-1)*16+j];
}
}
table_tbl.deleteRow(line);
table_tbl.insertRow(0);
for (i=0;i<16;i++){
table_tbl.rows(0).insertCell();
if (i<2||i>13) table_tbl.rows(0).cells(i).style.background="navy";
}
killedlines++;
cll.innerText=parseInt(cll.innerText)+1;
}
function DelLines(){
var c,d,i,j;
d=0;
curY=block_div.style.pixelTop;
for(i=(curY/20+3);i>curY/20-1;i--){
c=0;
for(j=2;j<14;j++){
if (isNaN(table[i*16+j])||i==21) break;
c+=table[i*16+j];
}
if(c==12){
DelLine(i);
i++;
d++;
}
}
if (d>0)
sco.innerText=parseInt(sco.innerText)+d*d*36;
}
function Lucifer(){
for(var i=2;i<14;i++){
if (table[16+i]==1) return true;
}
return false;
}
function GameOver(){
gameover=1;
clearInterval(gameInterval);
block_div.innerHTML="";
for (i=0;i<21;i++){
for (j=2;j<14;j++){
setTimeout("table_tbl.rows(" + i + ").cells(" + j + ").style.background = colors[Math.round(Math.random()*7)];",16*i*j);
}
}
nblock_div.innerHTML = "Game Over";
}
function document_onkeydown() {
if (gameover==1) return;
with (block_div.style){
curX = pixelLeft;
curY = pixelTop;
switch (event.keyCode){
case 37:
if (CanMove(curX-n_IncStep,curY,arr_curBlock))
pixelLeft-=n_IncStep;
break;
case 38:
Change(1);
break;
case 39:
if (CanMove(curX+n_IncStep,curY,arr_curBlock))
pixelLeft+=n_IncStep;
break;
case 40:
if (CanMove(curX,curY+n_IncStep,arr_curBlock)){
pixelTop+=n_IncStep;
}
else{
SaveBlock();
DelLines();
if (Lucifer()){
GameOver();
return;
}
sco.innerText=parseInt(sco.innerText)+2;
NewBlock();
}
break;
case 32:
if (pause==0){
clearInterval(gameInterval);
pause=1;
}
else{
gameInterval=window.setInterval("Handle_Interval()",(maxspeed-speed+1)*60);
pause=0;
}
break;
case 90:
Change(1);
break;
case 88:
Change(-1);
break;
default:
}
}
}
function Handle_Interval(){
curX = block_div.style.pixelLeft;
curY = block_div.style.pixelTop;
if (CanMove(curX,curY+n_IncStep,arr_curBlock)){
block_div.style.pixelTop+=n_IncStep;
}
else{
SaveBlock();
DelLines();
if (Lucifer()){
GameOver();
return;
}
sco.innerText=parseInt(sco.innerText)+2
NewBlock();
}
if (killedlines>=clr_per_line){
killedlines-=clr_per_line;
if (speed<maxspeed)
speed++;
else
speed=maxspeed;
spd.innerText=speed;
clearInterval(gameInterval);
gameInterval=window.setInterval("Handle_Interval()",(maxspeed-speed+1)*60);
}
}
</SCRIPT>
<SCRIPT LANGUAGE=javascript FOR=document EVENT=onkeydown>
if (document.all)
document_onkeydown()
</SCRIPT>
</HEAD>
<BODY LANGUAGE=javascript topmargin="0" leftmargin="0" scroll="no" >
<div id=block_div style="left:60;top:0">
<table id=block_tbl border=0 cellspacing=0 cellpadding=0>
<script>
if (document.all){
for (var i=0;i<4;i++){
document.write("<tr>");
for (var j=0;j<4;j++){
document.write("<td style=\"border:1 solid black;\"></td>");
}
document.write("</tr>");
}
}
</script>
</table>
</div>
<div id=nblock_div>
<table id=nblock_tbl border=0 cellspacing=0 cellpadding=0>
<script>
if (document.all){
for (var i=0;i<4;i++){
document.write("<tr>");
for (var j=0;j<4;j++){
document.write("<td style=\"height:40;width:40;border:1 outset black;\"></td>");
}
document.write("</tr>");
}
}
</script>
</table>
</div>
<div id=table_div>
<table id=table_tbl border=0 cellspacing=0 cellpadding=0>
<script>
if (document.all){
for (var i=0;i<22;i++){
document.write("<tr>");
for (var j=0;j<16;j++){
var d2 = i * 16 + j;
if (table[d2]==1)
document.write("<td bgcolor=navy></td>");
else
document.write("<td style=\"background:black;\"></td>");
}
document.write("</tr>");
}
}
</script>
</table>
</div>
<div id=title_div nowrap style="width: 407; height: 24; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12">
<p align="center">请输入游戏速度（0－9）： <input type="text" size=3 id="speedin" style="font-size: 9pt" name="SuperSo">
<button onClick="begintet()" id="but">
<font style="font-size: 9pt" face="Arial Black" color="#FF0000">OK</font></button></div>
<div id=infobar_div>
<table border=1 bordercolor=#000000 cellspacing=0 cellpadding=0>
<tr align=center>
<td style="color:99ccff;font-size: 9pt;width:60;">游戏速度：</td>
<td style="color:red;font-size: 9pt;" id=spd>1</td>
<td style="color:99ccff;font-size: 9pt;width:60;">总 得 分：</td>
<td style="color:red;font-size: 9pt;" id=sco>0</td>
<td style="color:99ccff;font-size: 9pt;width:60;">清除行数：</td>
<td style="color:red;font-size: 9pt;" id=cll>0</td>
</tr>
</table>
</div>
<SCRIPT ID=MainSection LANGUAGE=javascript>
if (document.all){
ncid = Math.round(Math.random()*(colors.length-1));
bid = Math.round(Math.random()*(blocks.length-1));
nextBlock = blocks[bid];
NewBlock();
}
function begintet(){
document.all.speedin.disabled=true
document.all.but.disabled=true
speed=parseInt(document.all.speedin.value);
if (isNaN(speed)||speed==null||speed>maxspeed||speed<1) speed=1;
spd.innerText=speed;
gameInterval=window.setInterval("Handle_Interval()",(maxspeed-speed+1)*60);
}
</SCRIPT>
</BODY>
</HTML>