Javascript doesn't have default argument in function definition. However, JavaScript doesn't require to call function with exactly the same argument.
      
      For example, a function defined as followings:
      function apple(a, b, c) { ........ }
      
      You can call this function:
      
      apple(4, 7, 9);
      or
      apple(4, 7);
      or
      apple(4);
      or
      apple();
      even or
      apple(5, 6, 8, 13, 50, 89); At this case, only the first three arguments are passed to the function, the other three will be ignored.
      
      So, inside of the function, we can use these statement to define the default values for a, b and c:
      
      function apple(a, b, c){
       a=(a)?a:"default a value";
       b=(b)?b:"default b value";
       c=(c)?c:"default c value";
      
      .......
      }

[02/24/2010, 05:14]