View difference between Paste ID: FmQ6N7Jt and Sqq0AMbG

 <?php
 
 add_filter('gform_register_init_scripts', 'gf_script_custom_scripts');
 function gf_script_custom_scripts($form) {
         ob_start();
         ?>
-  $date		=	$_POST["input_1"]; //GF 'date picker' using mm/dd/yyyy
+
-  $start	=	$_POST["input_2"]; //GF 'timefield' using military time
+        (function($) {
-  $end		=	$_POST["input_3"]; //GF 'timefield' using military time
+				$("li.gf_readonly input").attr("readonly","readonly");
         });
 
-  $startdate = new DateTime( $date . ' ' . $start[0] . ':' . $start[1] ) ;
+        })(jQuery);
 
-  $enddate = new DateTime( $date . ' ' . $end[0] . ':' . $end[1] ) ;
+        <?php
         $script = ob_get_clean();
         GFFormDisplay::add_init_script($form['id'], 'gf_custom_scripts', GFFormDisplay::ON_PAGE_RENDER, $script);
 
         return $form;
 }
 
 add_action("gform_pre_submission","pre_submission_handler");
 function pre_submission_handler($form) {
   // get input from form
   $date			=	$_POST["input_1"]; // GF 'Date Picker' mm/dd/yyy
   $starthour	=	$_POST["input_9"]; // GF "Drop Down' Hour Milittary Time
   $startminute	=	$_POST["input_14"]; // GF "Drop Down' Minute Milittary Time
-  $_POST["input_7"] = $diff;
+  $endhour		=	$_POST["input_10"]; // GF "Drop Down' Hour Milittary Time
   $endminute	=	$_POST["input_13"]; // GF "Drop Down' Minute Milittary Time
 
   // convert date and time arrays into datetime formats
   $startdate = new DateTime( $date . ' ' . $starthour . ':' . $startminute ) ;
 
   $enddate = new DateTime( $date . ' ' . $endhour . ':' . $endminute ) ;
 
   //convert datetimes into seconds to compare
   $starttime = strtotime( $startdate->format( 'm/d/Y H:i' ) );
   $endtime = strtotime( $enddate->format( 'm/d/Y H:i' ) );
 
   // check to see if the times span overnight
   if($starttime > $endtime)
     $endtime = strtotime($enddate->format('m/d/Y H:i:s') . " +1 day");
 
   // perform calculation
   $diff = floor(($endtime - $starttime)/60/60);
 
   $_POST["input_16"] = $diff;
 }