How to validate that 2 of a set of 40 form fields are filled in?

// These are the required fields on the form.// Populate array with their names.var requiredFields = new Array(14);requiredFields[0]  = "Name_dir";requiredFields[1]  = "Address_dir";requiredFields[2]  = "City_dir";requiredFields[3]  = "Zip_dir";requiredFields[4]  = "Phone_dir";requiredFields[5]  = "Date_emer";requiredFields[6]  = "Last_emer";requiredFields[7]  = "Address_emer";requiredFields[8]  = "Home_Number_emer";requiredFields[9]  = "Name_2_emer";requiredFields[10] = "Relation_emer";requiredFields[11] = "Phone_Number_2_emer";requiredFields[12] = "Phone_Number_3";requiredFields[13] = "Email";  // These are the alert messages shown when a required field is empty.// Populate array with messages.// Make sure there's one message for each required field.var alertMsg = new Array(14);alertMsg[0]  = "Please enter a Directory Name.";alertMsg[1]  = "Please enter a Directory Address.";alertMsg[2]  = "Please enter a Directory City.";alertMsg[3]  = "Please enter a Directory Zip Code.";alertMsg[4]  = "Please enter a Directory Phone Number.";alertMsg[5]  = "Please enter an Emergency Form Date.";alertMsg[6]  = "Please enter an Emergency Form Last Name.";alertMsg[7]  = "Please enter an Emergency Form Address.";alertMsg[8]  = "Please enter an Emergency Form Home Phone Number.";alertMsg[9]  = "Please enter an Emergency Form Contact Name.";alertMsg[10] = "Please enter an Emergency Form Contact Relationship.";alertMsg[11] = "Please enter an Emergency Form Contact Phone Number.";alertMsg[12] = "Please enter a Volunteer Form Phone Number.";alertMsg[13] = "Please enter a Volunteer Form Email Address.";  // Regular expression. It means start at beginning of string, look for any single// white space char, one or more times, to the end of the string.var emptyTest = /^\s*$/; var fieldCount = requiredFields.lengthvar fld = 0; for (var i=0; i < fieldCount; i++){fld = this.getField(requiredFields[i]);if( emptyTest.test(fld.value) )             // if required field is empty{app.alert(alertMsg[i]);fld.setFocus();break;}}  // Verify that at least 1 volunteer activity has been selected.// Don't check volunteer activities until all required fields above have been tested.if (i == fieldCount){var nActivityCount = 0;var minActivities = 1;for (var i=1; i < 42; i++){fld = this.getField("Activity" + i);if( !emptyTest.test(fld.value) )        // if Activity field is not emptynActivityCount++;} if(nActivityCount >= minActivities){this.mailDoc(false, "<span class="spamspan"><span class="u">me</span> [at] <span class="d">mydomain [dot] com</span></span>", "", "", "Associate Membership Application", "See attached file.");}else{app.alert("You must select at least 1 volunteer activity.");fld = this.getField("Activity1");fld.setFocus();}}

var nActivityCount = 0; // clear countvar oActivity = this.getField("Activity"); // get activity field objectvar aActivity = oActivity.getArray(); // convert object to an array// loop through array of fields using the field array for controlfor(i = 0; i < aActivity.length; i++)  {// count if check box is not unchecked or "Off"if(aActivity[i].value != "Off") nActivityCount++;} if(nActivityCount > 1)this.mailForm(...);elseapp.alert("Not enough Activities");

// define array of required field namesvar aReqFields = new Array("Activity1","Activity2", "Activity3", "Activity4"); var fld; // some debugging informationconsole.show();console.clear();console.println("Number of required fields: " + aReqFields.length); var nActivityCount = 0; // clear count// loop through the required field arrayfor(var i = 0;i < aReqFields.length; i++) { fld = this.getField(aReqFields[i]); // get field name for i element of array console.println (i + ": " + fld.value); // more debugging info if(fld.value != "Off"  )nActivityCount++;} console.println('Activity count: ' +  nActivityCount); // more debugging info if(nActivityCount > 1)this.mailForm(...);elseapp.alert("Not enough Activities");