<script>
function addRow(){
???
??? // 插入一行
??? myNewRow = document.all.myTable.insertRow();
??? var lenRow = document.all.myTable.rows.length; // 計算總行數(shù)
???
??? if(lenRow > 1){???????
??????? var point = myNewRow.rowIndex;??? // 計算當(dāng)前行位置???
??????? var lenCol = document.all.myTable.rows(0).cells.length; // 計算每行有幾列
???????
??????? // 插入lenCol個td
??????????? for (i=0; i < lenCol; i++) {
??????????????? document.all.myTable.rows(point).insertCell();
??????????????? document.all.myTable.rows(point).cells(i).innerHTML =?????????????????????????????????????????????? parseFloat(document.all.myTable.rows(point-1).cells(i).innerHTML) + lenCol;
??????? }
??? }else if(lenRow == 1){
??????? // 原來table是0行，初始化一行
??????? for(i = 0; i < 10; i++){
??????????? document.all.myTable.rows(0).insertCell();
??????????? document.all.myTable.rows(0).cells(i).innerHTML = i;
??????? }
??? }???
}

function delRow(){
??? document.all.myTable.deleteRow();
}
</script>
<a href="javascript: addRow()">增加一行</a>
<a href="javascript: delRow()">減去一行</a>
<table name=myTable border=1 id=myTable>
</table>