哈哈！我又遇到棘手的问题了?

Question

昨天我去参加学校地下室的面试,人家让做个小程序，一时间头脑煞白，咋办呀？结果让做个[color=#FFFF00]乘法表，可是不会做，你们今天抽空做下吧！！！谢谢了！！[/color]

Answer 1

<script>
      
     function s1(){            document.write("<table>");   
               for(i=1;i<=9;i++)            
                   {   
                     document.write("<tr style=\"background-color:#CCCCFF\">");                      for(k=1;k<=i;k++)        
                    { 
                       document.write("<td>");
                        document.write(k+"*");
                        document.write(i+"=");
                        document.write(k*i);
                       document.write("</td>");
                     }
                  document.write("</tr>");
               }
          document.write("</table>");
     }   s1(); /*****************************************************************/             function s2(){
                   
                   document.write("<table>");                            
                      for(k=9;k>=1;k--){                                        
                        document.write("<tr style=\"background-color:#99FFCC\">"); 
                            for(i=1;i<=k;i++){                                    
                               document.write("<td>");
                                   document.write(i+"*");
                                   document.write(k+"=");                                                        document.write(i*k);
                               document.write("</td>");
                            }
                         document.write("</tr>");
                      }
                     document.write("</table>");                   }
                s2();  /*****************************************************************/
                      function s3(){                           document.write("<table>");   
                               for(i=1;i<=9;i++){       
                                   document.write("<tr style=\"background-color:#FFCCCC\">");
                          
                            
                                     
                                   for(k=9;k>=1;k--)
                                     if(k>i)
                                      { document.write("<td style=\"background-color:white\">");
                                               document.write("&nbsp;");
                                               document.write("</td>");
                                        else{ 
                                            document.write("<td>");
                                              document.write(i+"*");
                                              document.write(k+"=");
                                              document.write(i*k);
                                            document.write("</td>");   */
                                                                  for(n=(9-i);n>=1;n--)  
                                            {  
                                               document.write("<td style=\"background-color:white\">");
                                                 document.write("&nbsp;");
                                               document.write("</td>");
                                             }                                         for(k=i;k>=1;k--)    
                                          { 
                                            document.write("<td>");
                                              document.write(i+"*");
                                              document.write(k+"=");
                                              document.write(i*k);
                                            document.write("</td>");                                           }
                                       document.write("</tr>");
                                   }
                                document.write("</table>");
                               }                           s3();    
/*********************************************************************/                    function s4(){
                         document.write("<table>");           
                           for(i=9;i>=1;i--){                   
                             document.write("<tr style=\"background-color:#FFFF99\">");                                 for(n=(9-i);n>=1;n--){          
                                   document.write("<td style=\"background-color:white\">");
                                    document.write("&nbsp;");
                                   document.write("</td>");
                                }                          for(k=i;k>=1;k--)
                            { 
                              document.write("<td>");
                                document.write(i);document.write("*");document.write(k);document.write                                      ("=");document.write(i*k);
                              document.write("</td>");                             }
                       document.write("</tr>");
                      }
                    document.write("</table>");
                }          s4();</script>
四种乘法表都在里面，正的，倒过来的，上下反的你自己看着办吧