Question

I’m trying to make a text area in javascript that by default displays three random three digit numbers and has an onclick highlight all property.

Answer 1

Using jquery, assuming your text area has id txtArea:

$(document).ready(function() {

   var dig1 = Math.floor(100 + Math.random() * 899);
   var dig2 = Math.floor(100 + Math.random() * 899);
   var dig3 = Math.floor(100 + Math.random() * 899);
  $('#txtArea').val(dig1 + ' ' + dig2 + ' ' + dig3);

  $('#txtArea').unbind('click').click(function() {
     $(this).select();
  });
});