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<HTML>
<SCRIPT LANGUAGE="JScript">
function numberCells()
{
var count=0;
for (i=0; i < document.all.mytable.rows.length; i++)
{
for (j=0; j < document.all.mytable.rows(i).cells.length; j++)
{
document.all.mytable.rows(i).cells(j).innerText = count;
count++;
}
}
}
function tb_addnew()
{
var ls_t=document.all("mytable")
maxcell=ls_t.rows(0).cells.length;
mynewrow = ls_t.insertRow();
for(i=0;i<maxcell;i++)
{
mynewcell=mynewrow.insertCell();
mynewcell.innerText="a"+i;
}
}
function tb_delete()
{
var ls_t=document.all("mytable");
ls_t.deleteRow() ;
}
</SCRIPT>
<BODY onload="numberCells()">
<TABLE id=mytable border=1>
<TR><TH> </TH><TH> </TH><TH> </TH><TH> </TH></TR>
<TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR>
<TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR>
</TABLE>
<input type=button value="新增" onclick="tb_addnew()">
<input type=button value="删除" onclick="tb_delete()" >
</BODY>
</HTML>