Validating Selection Lists

Selection lists are handled in the same way as other nontext objects using a for loop:

function windowreturn(field1){ myForm=document.forms[0]; for (var i=0; i < myForm.field1.length; i++){ if (myForm.list[i].selected) { choice = true; } } self.close(); }

Here's an example using JavaScript to verify that no more than x number of options are selected in a selection list field:

choices = 0; for (var i=0; i < field1.length; i++){ if (form.list[i].selected) { choices++; } } if (choices > 5) { alert("Sorry you can only pick 5 choices!"); } else { alert("You picked " + choices + " choices!"); }