How the Doctors Without Borders Pull-Down Navigation Tool Works
The Doctors Without Borders pull-down navigation code is very similar to the JavaScript you saw in Figure 7-27. Figure 7-28 shows you their code, modified to save space:
Figure 7-28. Code for the Doctors Without Borders pull-down navigation tool
The only big difference between the code in Figure 7-27 and the Doctors Without Borders code in Figure 7-28 is the if-then clause starting in ❶. This extra test is necessary because the first option in their pull-down contains no value—it's just a header. If a visitor selects an option with no value, the value property of the select is set to ...
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