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此代码当m≠n 时，有问题。暂时还未解决此问题。
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>?? ??</title> 6 <style type="text/css"> 7 table{ 8 font:12px arial; 9 color:#565; 10 } 11 th,td { 12 background-color:#dfc; 13 border-bottom:2px solid #b3de94; 14 border-top:3px solid #ffffff; 15 padding:9px; 16 } 17 .on { 18 background-color:#363; 19 color:#fff; 20 } 21 </style> 22 23 </head> 24 25 <body> 26 <table> 27 <tr> 28 <th>NO.</th> 29 <th>Name</th> 30 <th>Age</th> 31 <th>Sex</th> 32 <th>Job</th> 33 <th>Country</th> 34 </tr> 35 <tr> 36 <td>1</td> 37 <td>Amy</td> 38 <td>18</td> 39 <td>Girl</td> 40 <td>student</td> 41 <td>USA</td> 42 </tr> 43 <tr> 44 <td>2</td> 45 <td>Timy</td> 46 <td>20</td> 47 <td>Boy</td> 48 <td>student</td> 49 <td>USA</td> 50 </tr> 51 <tr> 52 <td>3</td> 53 <td>Mike</td> 54 <td>25</td> 55 <td>Boy</td> 56 <td>doctor</td> 57 <td>USA</td> 58 </tr> 59 <tr> 60 <td>4</td> 61 <td>Lily</td> 62 <td>20</td> 63 <td>Girl</td> 64 <td>nurse</td> 65 <td>China</td> 66 </tr> 67 </table> 68 <script type="text/javascript"> 69 var rows = Array.prototype.slice.call(document.getElementsByTagName(‘tr‘)); 70 var cols = Array.prototype.slice.call(document.getElementsByTagName(‘th‘)); 71 var cells = Array.prototype.slice.call(document.getElementsByTagName(‘td‘)); 72 var cells_Sum = new Array (); 73 cells_Sum =Array.prototype.slice.call(rows[0].childNodes); 74 document.write(cells_Sum.length+‘<br/>‘); 75 /*for(var i=0;i<rows.length;i++){ 76 cells_Sum[i]=rows[i].childNodes; 77 document.write(rows[i].childNodes.innerHTML+‘<br/>‘); 78 }*/ 79 80 /*document.write(cells[6].innerHTML+‘<br/>‘); 81 82 for(var i=0;i<rows.length;i++){ 83 for(var j=0;j<cols.length;j++) { 84 document.write(cells_Sum[i][j].innerHTML+‘ ‘); 85 } 86 document.write(‘<br/>‘) 87 }*/ 88 89 </script> 90 </body> 91 </html>
当m=n 时，可以使用取余的方式。代码略。
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原文地址：http://www.cnblogs.com/BBCaroline/p/4601836.html
