javascript获取表格 td 中的内容

<SCRIPT LANGUAGE="JScript"> function numberCells() { var count=0; for (i=0; i < window.oTable.rows.length; i++) { for (j=0; j < window.oTable.rows[i].cells.length; j++) { alert(window.oTable.rows[i].cells[j].innerHTML); } } } </SCRIPT> <BODY onload="numberCells()"> <TABLE id=oTable border=1> <TR><TH>1</TH><TH>2</TH><TH>3</TH><TH>4</TH></TR> <TR><TD>5</TD><TD>6</TD><TD>7</TD><TD>8</TD></TR> <TR><TD>9</TD><TD>10</TD><TD>11</TD><TD>12</TD></TR> </TABLE>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]