html九九乘法表：
<style>td{
border: 1px solid ;
</style>
<script>document .write ("<table> " );
for(var i=1;i<=9;i++){
document .write ("<tr>");
for(var j=1;j<=i;j++){
document .write ("<tdx");document.write (i+"*"+j+"-"+(i*j)+"   ");document .write ("</td>");
document .write ("</tr>");
}document .write ("</table>");
</script>
