// Form validation functions
function formValid(){
var missingFields = false;
var missingMessage = "";

if (pdfrequest.publication.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Publication Name";
missingFields = true;
}

if (pdfrequest.issueDate.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Publication Date";
missingFields = true;
}

if (pdfrequest.pageNumber.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Page Number";
missingFields = true;
}

if (pdfrequest.quantity.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Quantity";
missingFields = true;
}

if (pdfrequest.fname.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "First Name";
missingFields = true;
}

if (pdfrequest.lname.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Last Name";
missingFields = true;
}

if (pdfrequest.address.value == ""){if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Address";
missingFields = true;
}

if (pdfrequest.city.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "City";
missingFields = true;
}

if (pdfrequest.state.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "State";
missingFields = true;
}

if (pdfrequest.zip.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Zip";
missingFields = true;
}

if (pdfrequest.phone.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Phone Number";
missingFields = true;
}

if (pdfrequest.email.value == "") {if (missingMessage != "") {missingMessage = missingMessage + ", ";}
missingMessage += "Email Address";
missingFields = true;
}
 
if (missingFields == true) {
alert("Please enter the following information to complete your request: " + missingMessage + ".");
return false;
} else {
return true;
}
}