use strict;
use Win32::IE::Mechanize; 

    my $ie = Win32::IE::Mechanize->new( visible => 1 );   
    my $url ='http://url/';
    my $ie = $ie->get( $url ); 
my $ie->find_link (url=>"javascript:subForm('UA_Signin','signOff')";
[download]

Did you try running your code?

#!/usr/bin/perl

use strict;
use warnings; #added by me
use Win32::IE::Mechanize; 

my $ie = Win32::IE::Mechanize->new( visible => 1 );   
my $url ='http://url/';
my $ie = $ie->get( $url ); 
my $ie->find_link (url=>"javascript:subForm('UA_Signin','signOff')";
[download]

Returns

"my" variable $ie masks earlier declaration in same scope at ftp.pl li
+ne 9.
"my" variable $ie masks earlier declaration in same scope at ftp.pl li
+ne 10.
syntax error at ftp.pl line 10, near ""javascript:subForm('UA_Signin',
+'signOff')
";"
Execution of ftp.pl aborted due to compilation errors.
[download]

First of all, you need to learn some basic Perl. Look at my, as the error message above shows, you don't need to re-declare $ie every time you make a reference to it.

Secondly look at $ie = $ie->get( $url );. I think you mean to use $ie->get($url);.

Thirdly, I suggested that you use:
$ie->follow_link
rather than:
$ie->find_link.
Also you have:
$ie->find_link (url=>"javascript:subForm('UA_Signin','signOff')";
rather than:
$ie->find_link(url => "javascript:subForm('UA_Signin','signOff')");

Putting this all together you can see a basic example:

#!/usr/bin/perl

# Win32::IE::Mechanize example, go to www.google.co.uk follow link 'Ab
+out Google'

use strict;
use warnings;
use Win32::IE::Mechanize; 

my $ie = Win32::IE::Mechanize->new( visible => 1 );   
my $url ='http://www.google.co.uk/';
$ie->get($url); 
$ie->follow_link(text => 'About Google'); # This the line that you nee
+d to change, I will leave that to you as an exercise
[download]

I would suggest you send time in the tutorials section of this site, and understanding the module documentation.

Hope this helps

Martin