javascript label break 语句

javascript label break 语句

<html>
   <body>

      <script type = "text/javascript">
         <!--
            document.write("Entering the loop!<br /> ");
            outerloop:        // This is the label name

            for (var i = 0; i < 5; i++)
            {
               document.write("Outerloop: " + i + "<br />");
               innerloop:
               for (var j = 0; j < 5; j++)
               {
                  if (j > 3 ) break ;           // Quit the innermost loop
                  if (i == 2) break innerloop;  // Do the same thing
                  if (i == 4) break outerloop;  // Quit the outer loop
                  document.write("Innerloop: " + j + " <br />");
               }
            }

            document.write("Exiting the loop!<br /> ");
         //-->
      </script>

   </body>
</html>