html.push("<tr><td width='40'>符号</td><td width='80'>编码</td><td width='40'>符号</td><td width='80'>编码</td><td width='40'>符号</td><td width='80'>编码</td><td width='40'>符号</td><td width='80'>编码</td></tr>");
for(var i = 1; i <= 65536; i++){
if(i % 4 == 1){
html.push("<tr>");
}
html.push("<td>&#" + i + ";</td><td>&#" + i + ";</td>");
if(i % 4 == 0){
html.push("</tr>");
}
}
document.write(html.join(""));
参考地址：
http://sjyhome.com/html/html-special-characters.html