var tab=document.getElementById("id"); var rows=tab.rows; alert(rows.length); for(var i=0;i<rows.length;i++) { for(var j=0;j<rows[i].cells.length;j++) ...
var tab=document.getElementById("id"); var rows=tab.rows; alert(rows.length); for(var i=0;i<rows.length;i++)
{
for(var j=0;j<rows[i].cells.length;j++)
{
rows[i].cells[j].innerHTML="xxx";//修改值
alert("第"+(i+1)+"行,第"+(j+1)+"列的值是:"+rows[i].cells[j].innerHTML);
}
}