多年前写这个代码的时候，网上还没有其他类似的跨浏览器chart实现。后来在国外网站上才开始出现了类似的代码。
<HTML>
<HEAD>
<TITLE>画图</TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="emu">
<META NAME="Keywords" CONTENT="chart javascript">
<META NAME="Description" CONTENT="emu's dhtml chart">
<SCRIPT LANGUAGE="JavaScript">
<!--
function drawLine(x0,y0,x1,y1,color){
var rs = "";
if (y0 == y1) //画横线
{
if (x0>x1){var t=x0;x0=x1;x1=t}
rs = "<p class=emuH style='top:"+y0+";left:"+x0+";background-color:"+color+"; width:"+Math.abs(x1-x0)+"'/>";
}
else if (x0 == x1) //画竖线
{
if (y0>y1){var t=y0;y0=y1;y1=t}
rs = "<p class=emuW style='top:"+y0+";left:"+x0+";background-color:"+color+";height:"+Math.abs(y1-y0)+"'/>";
}
else
{
var lx = x1-x0
var ly = y1-y0
var l = Math.sqrt(lx*lx+ly*ly)
rs = new Array();
for (var i=0;i<l;i+=1)
{
var p = i/l;
var px = parseInt(x0 + lx*p);
var py = parseInt(y0 + ly*p);
rs[rs.length] = "<p class=emuWH style='top:"+py+";left:"+px+";background-color:"+color+"'/>";
}
rs = rs.join("");
}
return rs
}
function drawRectangle(x0,y0,x1,y1,color,title)
{
if (x0 == x1 || y0 == y1) return;
if (x0>x1) {var t=x0;x0=x1;x1=t}
if (y0>y1) {var t=y0;y0=y1;y1=t}
return "<table style='top:"+y0+";left:"+x0+";position:absolute' title="+title+"><td bgcolor="+color+" width="+(x1-x0)+" height="+(y1-y0)+"> </td></table>";
}
function outText(x0,y0,text,fontSize,color){
return "<p style='top:"+y0+";left:"+x0+";position:absolute;color:"+color+";font-size:"+fontSize+"'>"+text+"</p>";
}
var points = new Array(1000);
function drawPie(x0,y0,radius,startAngle,endAngle,color){
if (points.length<radius<<2) points.length=radius<<2;
var startAngle = startAngle*Math.PI/180;
var endAngle = endAngle*Math.PI/180;
var maxX=0,maxY=0,minX=0,minY=0;
var pointsLength = 0;
var lines ;
// get arc points
var step = 1/radius;
for (var i=startAngle;i<endAngle;i+=step){
var x = Math.round(Math.sin(i)*radius);
var y = Math.round(Math.cos(i)*radius)
points[pointsLength++]=[x,y];
if (maxX<x) maxX=x;
if (minX>x) minX=x;
if (maxY<y) maxY=y;
if (minY>y) minY=y;
}
// get radius points
var dx1=Math.sin(startAngle)*radius;
var dy1=Math.cos(startAngle)*radius;
var dx2=Math.sin(endAngle)*radius;
var dy2=Math.cos(endAngle)*radius;
var L = Math.sqrt(dx1*dx1+dy1*dy1);
var stepx1 = dx1/L , stepy1 = dy1/L ,stepx2 = dx2/L , stepy2 = dy2/L ;
for (var i=0;i<L;i+=.99){
points[pointsLength++] = [Math.round(stepx1*i),Math.round(stepy1*i)]
points[pointsLength++] = [Math.round(stepx2*i),Math.round(stepy2*i)]
}
var dx = maxX-minX+1;
var dy = maxY-minY+1;
if (dx>dy){
lines = new Array(dy);
for (var i=pointsLength-1;i>-1;i--){
var p0 = points[i];
var px = p0[0];
var y = p0[1]-minY;
if (lines[y]){
if (lines[y][0]>px) //left point
lines[y][0] = px;
if (lines[y][1]<px) //right point
lines[y][1] = px;
}else{
lines[y]=[px,px];
}
}
for (var i=dy-1;i>-1;i--){
var left = lines[i][0];
lines[i] = "<p class=emuH style='top:"+(i+minY+y0)+";left:"+(left+x0)+";width:"+(lines[i][1]-left)+";background-color:"+color+"'/>";
}
}else{
lines = new Array(dx);
for (var i=pointsLength-1;i>-1;i--){
var p0 = points[i];
var py = p0[1];
var x = p0[0]-minX;
if (lines[x]){
if (lines[x][0]>py) //top point
lines[x][0] = py;
if (lines[x][1]<py) //buttom point
lines[x][1] = py;
}else{
lines[x]=[py,py];
}
}
for (var i=dx-1;i>-1;i--){
var top = lines[i][0];
lines[i] = "<p class=emuW style='left:"+(i+minX+x0)+";top:"+(top+y0)+";height:"+(lines[i][1]-top)+";background-color:"+color+"'/>";
}
}
return lines.join("");
}
function drawArc(x0,y0,radius,startAngle,endAngle,color,step){
if (step == null || isNaN(step)) step=1;
rs = new Array();
tmpar = new Array();
startAngle = startAngle/180*Math.PI;
endAngle = endAngle/180*Math.PI;
for (var i=startAngle;i<endAngle;i+=(step/radius))
{
var dx = parseInt(Math.sin(i)*radius+x0);
var dy = parseInt(Math.cos(i)*radius+y0);
rs[rs.length] = "<p class=emuWH style='top:"+dy+";left:"+dx+";background-color:"+color+"'/>";
}
return (rs.join(""));
}
function fixTo(s,i){
if (s==null || s=="" || isNaN(s) || Math.round(s)==0) return 0;
i = Math.round(i);
if (i==0) return Math.round(s);
if (i==null || isNaN(i) || i<0) i=2;
var v = Math.round(s*Math.pow(10,i)).toString();
if (/e/i.test(v)) return s;
return v.substr(0,v.length-i)+"."+v.substr(v.length-i);
}
//-->
</SCRIPT>
<style>
.emuW{position:absolute;font-size:1px;width:1}
.emuH{position:absolute;font-size:1px;height:1}
.emuWH{position:absolute;font-size:1px;width:1;height:1}
A{text-decoration:none;color:#FF66FF}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!--
function drawCol(e){
var div1 = document.getElementById("canvas")
var rows = e.parentNode.parentNode.rows;
var cellIndex = e.cellIndex;
var data = [];
for (var i=1;i<rows.length;i++){
var d = parseInt(rows[i].cells[cellIndex].innerHTML);;
if (isNaN(d)){
alert("Invalid data!");
return;
}
var color = rows[i].bgColor;
var title = rows[i].cells[0].innerHTML;
data[i-1] = [d,color,title]
}
var chartTitle = outText(250,150+(document.all?5:-10),e.innerHTML+"得分情况对比",15,"blue");
div1.innerHTML = chartTitle+drawPoleWidthData(data).join("")+drawPieWidthData(data).join("");
}
function drawPieWidthData(data){
var sum=0;
var rs = new Array();
for (var i=0;i<data.length;i++) sum += data[i][0];
var startAngle = 0;
for (var i=0;i<data.length;i++){
var angle = data[i][0]/sum*360;
rs[i] = drawPie(580,250,100,startAngle,startAngle+=angle,data[i][1])
}
return rs;
}
function drawPoleWidthData(data){
var rs = new Array();
var max = 0;
for (var i=0;i<data.length;i++) if(max<data[i][0])max=data[i][0];
for (var i=0;i<data.length;i++){
rs[rs.length] = outText(i*100+140,400+(document.all?5:-10),data[i][2],12,"blue");
var top = 400-200*data[i][0]/max;
rs[rs.length] = drawRectangle(i*100+130,top,i*100+170,400,data[i][1],"￥"+fixTo(data[i][0]))
}
rs[rs.length]= drawLine(100,400,500,400,"black")
rs[rs.length]= drawLine(100,400,100,150,"black")
rs[rs.length]= drawLine(500,400,490,405,"black")
rs[rs.length]= drawLine(100,150,95,160,"black")
rs[rs.length]= drawLine(500,400,490,395,"black")
rs[rs.length]= drawLine(100,150,105,160,"black")
return rs;
}
function drawRow(e){
var div1 = document.getElementById("canvas")
var row = e.parentNode;
var cells = row.cells;
var rowIndex = row.rowIndex;
var data = [];
for (var i=1;i<cells.length;i++){
var d = parseInt(cells[i].innerHTML);;
if (isNaN(d)){
alert("Invalid data!");
return;
}
var color = row.bgColor;
var title = row.parentNode.rows[0].cells[i].innerHTML;
data[i-1] = [d,color,title]
}
var chartTitle = outText(250,150+(document.all?5:-10),e.innerHTML+"得分情况走向",15,"blue");
div1.innerHTML = chartTitle+drawLineWidthData(data).join("");
}
function drawLineWidthData(data){
var rs = new Array();
rs[rs.length]= drawLine(100,400,770,400,"black")
rs[rs.length]= drawLine(100,400,100,150,"black")
rs[rs.length]= drawLine(770,400,760,405,"black")
rs[rs.length]= drawLine(100,150,95,160,"black")
rs[rs.length]= drawLine(770,400,760,395,"black")
rs[rs.length]= drawLine(100,150,105,160,"black")
var max = 0;
for (var i=0;i<data.length;i++) if(max<data[i][0])max=data[i][0];
var top;
for (var i=0;i<data.length;i++){
rs[rs.length] = outText(i*100+140,400+(document.all?5:-10),data[i][2],12,"blue");
if (i>0){
rs[rs.length] = drawLine(i*100+50,top,i*100+150,(400-200*data[i][0]/max),data[i][1])
}
top = 400-200*data[i][0]/max;
}
return rs;
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<TABLE bgcolor=black cellspacing=1>
<TR bgcolor=#FFFFCC>
<TD>得分</TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第1场</A></TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第2场</A></TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第3场</A></TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第4场</A></TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第5场</A></TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第6场</A></TD>
<TD onclick="drawCol(this)" align=center><A HREF="javascript:;">第7场</A></TD>
</TR>
<TR bgcolor=#CCFFCC>
<TD onclick="drawRow(this)"><A HREF="javascript:;">二分球</A></TD>
<TD>14</TD>
<TD>24</TD>
<TD>8</TD>
<TD>32</TD>
<TD>12</TD>
<TD>18</TD>
<TD>22</TD>
</TR>
<TR bgcolor=#CCCCFF>
<TD onclick="drawRow(this)"><A HREF="javascript:;">三分球</A></TD>
<TD>9</TD>
<TD>3</TD>
<TD>15</TD>
<TD>6</TD>
<TD>3</TD>
<TD>9</TD>
<TD>3</TD>
</TR>
<TR bgcolor=#FFCCCC>
<TD onclick="drawRow(this)"><A HREF="javascript:;">罚球</A></TD>
<TD>8</TD>
<TD>7</TD>
<TD>2</TD>
<TD>11</TD>
<TD>3</TD>
<TD>5</TD>
<TD>12</TD>
</TR>
</TABLE>
<div id=canvas></div>
</BODY>
</HTML>