diff -N -a --unified -r mantisbt/bug_change_status_page.php mantisbt-resolution_for_duplicate/bug_change_status_page.php
--- mantisbt/bug_change_status_page.php	2008-11-30 14:16:41.000000000 -0500
+++ mantisbt-resolution_for_duplicate/bug_change_status_page.php	2008-12-01 13:19:54.198116100 -0500
@@ -125,7 +125,7 @@
 		<?php echo lang_get( 'resolution' ) ?>
 	</td>
 	<td>
-		<select name="resolution">
+		<select id="resolution" name="resolution">
 			<?php 
                 $t_resolution = $t_bug_is_open ? FIXED : $t_current_resolution;
                 print_enum_string_option_list( "resolution", $t_resolution );
@@ -138,7 +138,7 @@
 <?php
 if ( ( $t_resolved <= $f_new_status ) && ( CLOSED > $f_new_status ) ) { ?>
 <!-- Duplicate ID -->
-<tr <?php echo helper_alternate_class() ?>>
+<tr <?php echo helper_alternate_class() ?> id="duplicate_id_row">
 	<td class="category">
 		<?php echo lang_get( 'duplicate_id' ) ?>
 	</td>
@@ -146,6 +146,29 @@
 		<input type="text" name="duplicate_id" maxlength="7" />
 	</td>
 </tr>
+
+<script language="javascript">
+	function is_duplicate_id()
+	{
+		if( document.getElementById("resolution").options[this.selectedIndex].value == <?php echo $g_bug_duplicate_resolution ?> )
+			toggle_control("duplicate_id_row", true);
+		else
+			toggle_control("duplicate_id_row", false);
+	}
+
+	function toggle_control(itemID, enabled)
+	{
+		if (enabled) {
+			document.getElementById(itemID).style.display = 'inline'; 
+		} else { 
+			document.getElementById(itemID).style.display = 'none'; 
+		}
+	}
+	
+	document.getElementById("resolution").onchange = is_duplicate_id;
+	toggle_control("duplicate_id_row", false);
+</script>
+
 <?php } ?>
 
 <?php