新手求救：怎么用javascript动态生成一个有若干行的table??

给个例子给你参考:
<TABLE BORDER="1" id=table1>
  <TR>
    <TD>Stock Symbol</TD>
    <TD>High</TD>
    <TD>Low</TD>
    <TD>Close</TD>
  </TR>
  <TR>
    <TD>ABCD</TD>
    <TD>88.625</TD>
    <TD>85.50</TD>
    <TD>85.81</TD>
  </TR>
  <TR>
    <TD>EFGH</TD>
    <TD>102.75</TD>
    <TD>97.50</TD>
    <TD>100.063</TD>
  </TR>
  <TR>
    <TD>IJKL</TD>
    <TD>56.125</TD>
    <TD>54.50</TD>
    <TD>55.688</TD>
  </TR>
  <TR>
    <TD>MNOP</TD>
    <TD>71.75</TD>
    <TD>69.00</TD>
    <TD>69.00</TD>
  </TR>
</TABLE>
<input type=button value=insert onclick=xxx()>
<script>
function xxx() {var newrow=table1.insertRow();
for (i=0;i<4;i++) {
var newcell=newrow.insertCell(i);
newcell.innerText='new'+i;
}
}
</script>

解决方案 »

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通过DOM你可以动态改变TABLE的CELLS和ROWS及表格内的内容例子:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Document Object Model Table Sample</TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=iso-8859-1">
<META NAME="AUTHOR" CONTENT="InetSDK">
<META NAME="MS.LOCALE" CONTENT="EN-US">
<META NAME="ROBOTS" CONTENT="noindex">
<LINK REL="stylesheet" HREF="/msdn-online/shared/css/ie4.css" TYPE="text/css">
</HEAD>


<BODY TOPMARGIN=0 LEFTMARGIN=0 BGPROPERTIES="FIXED" BGCOLOR="#FFFFFF" LINK="#000000" VLINK="#808080" ALINK="#000000"><BLOCKQUOTE CLASS="body">

<H1>Document Object Model Table Sample</H1><P>This sample demonstrates a table created with the Document Object Model.
<BLOCKQUOTE>
<DIV ID="oTableContainer"></DIV>
</BLOCKQUOTE><SCRIPT LANGUAGE="JScript">
// Declare variables and create the header, footer, and caption.
var oTable = document.createElement("TABLE");
var oTHead = document.createElement("THEAD");
var oTBody0 = document.createElement("TBODY");
var oTBody1 = document.createElement("TBODY");
var oTFoot = document.createElement("TFOOT");
var oCaption = document.createElement("CAPTION");
var oRow, oCell;
var i, j;// Declare stock data that would normally be read in from a stock Web site.
var heading = new Array;heading[0] = "Stock symbol";
heading[1] = "High";
heading[2] = "Low";
heading[3] = "Close";var stock = new Array;stock["0,0"] = "ABCD";
stock["0,1"] = "88.625";
stock["0,2"] = "85.50";
stock["0,3"] = "85.81";stock["1,0"] = "EFGH";
stock["1,1"] = "102.75";
stock["1,2"] = "97.50";
stock["1,3"] = "100.063";stock["2,0"] = "IJKL";
stock["2,1"] = "56.125";
stock["2,2"] = "54.50";
stock["2,3"] = "55.688";stock["3,0"] = "MNOP";
stock["3,1"] = "71.75";
stock["3,2"] = "69.00";
stock["3,3"] = "69.00";// Insert the created elements into oTable.
oTable.appendChild(oTHead);
oTable.appendChild(oTBody0);
oTable.appendChild(oTBody1);
oTable.appendChild(oTFoot);
oTable.appendChild(oCaption);// Set the table's border width and colors.
oTable.border=1;
oTable.bgColor="lightslategray";// Insert a row into the header and set its background color.
oRow = document.createElement("TR");
oTHead.appendChild(oRow);
oTHead.bgColor = "lightskyblue";// Create and insert cells into the header row.
for (i=0; i<4; i++)
{
  oCell = document.createElement("TH");
  oCell.innerText = heading[i];
  oRow.appendChild(oCell);
}// Create and insert rows and cells into the first body.
for (i=0; i<2; i++)
{
  oRow = document.createElement("TR");
  oTBody0.appendChild(oRow);
  for (j=0; j<4; j++)
  {
    oCell = document.createElement("TD");
oCell.innerText = stock[i + "," + j];
    oRow.appendChild(oCell);
  }
}// Set the background color of the first body.
oTBody0.bgColor = "lemonchiffon";// Create and insert rows and cells into the second body.
for (i=2; i<4; i++)
{
  oRow = document.createElement("TR");
  oTBody1.appendChild(oRow);
  for (j=0; j<4; j++)
  {
    oCell = document.createElement("TD");
oCell.innerText = stock[i + "," + j];
    oRow.appendChild(oCell);
  }
}// Set the background color of the second body.
oTBody1.bgColor = "goldenrod";// Create and insert rows and cells into the footer row.
oRow = document.createElement("TR");
oTFoot.appendChild(oRow);
oCell = document.createElement("TD");
oRow.appendChild(oCell);
oCell.innerText = "Quotes are for example only.";
oCell.colSpan = "4";
oCell.bgColor = "lightskyblue";// Set the innerText of the caption and position it at the bottom of the table.
oCaption.innerText = "Created using Document Object Model."
oCaption.style.fontSize = "10";
oCaption.align = "bottom";// Insert the table into the document tree.
oTableContainer.appendChild(oTable);</SCRIPT>

<BR><BR><BR>
© <A CLASS="clsIncCpyRt" HREF="http://www.microsoft.com/isapi/gomscom.asp?TARGET=/info/cpyright.htm" TARGET="_top"> 2002 Microsoft Corporation. All rights reserved. Terms of use</A>.

</BLOCKQUOTE>
</BODY>
</HTML>
<body>
<script>
var tt=document.createElement("table");
var tbody=document.createElement("tbody")
tt.appendChild(tbody);
tt.border='1';
for(var i=0;i<3;i++)
{
var tr=document.createElement("tr");
for(var j=0;j<3;j++)
{
var hd=document.createElement("td");
hd.appendChild(document.createTextNode("测试"));
tr.appendChild(hd);
}
tbody.appendChild(tr);
}
document.body.appendChild(tt);
</script>
<table width="100%" border="1" cellspacing="0" cellpadding="0" id=t>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</table>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
自己写了个，大家参考：
function createTable()
{
  var table = document.createElement("table");
  table.className="tw_table"
  table.setAttribute("border","1");
  table.setAttribute("width","100%");

  document.body.appendChild(table);
  var header = table.createTHead();
  var headerrow = header.insertRow(0);
  headerrow.bgColor="#ffcc00";
  headerrow.insertCell(0).appendChild(document.createTextNode("1111"));
  headerrow.insertCell(1).appendChild(document.createTextNode("2222"));
  headerrow.insertCell(2).appendChild(document.createTextNode("3333"));
  headerrow.insertCell(3).appendChild(document.createTextNode("4444"));
  headerrow.insertCell(4).appendChild(document.createTextNode("5555"));
  headerrow.insertCell(5).appendChild(document.createTextNode("6666"));
  for (i=0;i<10;i++){
   var row = table.insertRow(i+1);

   row.insertCell(0).appendChild(document.createTextNode("td1_"+i));
   row.insertCell(1).appendChild(document.createTextNode("td2_"+i));
   row.insertCell(2).appendChild(document.createTextNode("td3_"+i));
   row.insertCell(3).appendChild(document.createTextNode("td4_"+i));
   row.insertCell(4).appendChild(document.createTextNode("td5_"+i));
   row.insertCell(5).appendChild(document.createTextNode("td6_"+i));
  }
}
100分的帖子回复的就是快呀，但是效率高的还是我找到的，这个效率要高多了，FAQ上的
<body>
<div  id=test></div>
<script>
var  arrList  =  new  Array(1000);
var  b=new  Date()
var  sTmp  =  new  Array();
for(i=0;i<arrList.length;i++){
       sTmp[i]=  '<tr><td>'+i+'</td></tr>';
}
test.innerHTML  =  '<table>'+sTmp.join("")+'</table>';
alert(new  Date()-b)
</script>
</body>
楼上，在数据量不大的情况下，用DOM操作还是较快些的
<table id=t border width=60%></table>
<script defer>
for(var i=0;i<100;i++){
var tr=(i % 4==0)?t.insertRow():t.rows[t.rows.length-1]
tr.insertCell().innerHTML=i
}
</script>
其中i % 4 的这个4是列数，可以修改为自己要的数字。
行数就是 100 /4 修改100就是了。 100是所有单元格的数目
我的最短,^_^只要一句话
for(var i=0;i<100;i++) tr=(i % 4==0)?t.insertRow():t.rows[t.rows.length-1].insertCell().innerHTML=i