duplicate file verification

[chunk1978]

hello. i'd like to know if there's a way in JavaScript to distinguish a difference between two file fields for verification.

on the form i am writing, there are 2 file fields far apart from each other, so a user does not see them on the same page level... therefore i think it would be a good idea to write a validation check to see if the user accidently entered the same file in both fields... however, i'm having a difficult time trying to imagine how i would do that...

perhaps something like the following?

function ValidateDuplicateFile()
     {
     var File1 = document.form.file1.value;
     var File2 = document.form.file2.value;

     if (File1 = File2){
     alert( "Both of your files are the same" );
     document.form.file1.value.focus();
     return false;}

     return true;
}

sorry i have no way to test this right now, so if any of you JavaScript geniuses think this code would work for me, please let me know. thanks a lot!

[acoder]

I've modified your code below:

function ValidateDuplicateFile()
     {
     var File1 = document.form.file1.value;
     var File2 = document.form.file2.value;

     if (File1 == File2){
     alert( "Both of your files are the same" );
     document.form.file1.focus();
     return false;}

     return true;
}

Notice the changes I made:
1. File1=File2 replaced by File1==File2 (comparing instead of assigning/setting).
2. focus() is a method of the file input object, not value (which is an attribute of the file input object and therefore cannot have methods).

[chunk1978]

I've modified your code below

excellent... thanks again acoder!

[acoder]

No problem. You're welcome.