Article Figure 1 Figure 2 Figure 3 Listing 1
Listing 2 Listing 3 Listing 4 Listing 5 mar2006.tar

Listing 4 Field validation details

<input 
    name="first_name"                         (1)
    id="first_name"                         (2)
    type=text 
    size=40 
    maxlength=50 
    required="first_name is required"             (3)
    validate="return validateFirst_name(what)"         (4)
    value="">