window.onload=function (){
   
    print();
   
   
   
   
   
   
   
   
}
 document.write("<table>");
function print(){
      
for (var i= 1; i<10; i++){
   
    document.write("<tr>");     
    for (var j= 1; j<10; j++){  
                             document.write("<td>"+j+"*"+i+"="+j*i+"&nbsp"+"</td>");
    if(i==j){
             document.write("<br>");
             break;
            }   
                             }
   
          document.write("</tr>");  
                         }  
  
 
 
}
  document.write("</table>");

上面的是js的代码   如何才能加边框呢