diff --git a/usr/local/www/javascript/firewall_nat_edit/firewall_nat_edit.js b/usr/local/www/javascript/firewall_nat_edit/firewall_nat_edit.js
index 04f0ba8e40..bce5e43856 100644
--- a/usr/local/www/javascript/firewall_nat_edit/firewall_nat_edit.js
+++ b/usr/local/www/javascript/firewall_nat_edit/firewall_nat_edit.js
@@ -29,9 +29,6 @@ function check_for_aliases() {
 	/*  if External port range is an alias, then disallow
 	 *  entry of Local port
 	 */
-	document.iform.endport_cust.disabled = 0;
-	document.iform.localbeginport.disabled = 0;
-	document.iform.localbeginport_cust.disabled = 0;
 	for(i=0; i<customarray.length; i++) {
 		if(document.iform.beginport_cust.value == customarray[i]) {
 			document.iform.endport_cust.value = customarray[i];
@@ -39,6 +36,9 @@ function check_for_aliases() {
 			document.iform.endport_cust.disabled = 1;
 			document.iform.localbeginport.disabled = 1;
 			document.iform.localbeginport_cust.disabled = 1;
+			document.iform.endport_cust.disabled = 0;
+			document.iform.localbeginport.disabled = 0;
+			document.iform.localbeginport_cust.disabled = 0;
 		}
 		if(document.iform.beginport.value == customarray[i]) {
 			document.iform.endport_cust.value = customarray[i];
@@ -46,6 +46,9 @@ function check_for_aliases() {
 			document.iform.endport_cust.disabled = 1;
 			document.iform.localbeginport.disabled = 1;
 			document.iform.localbeginport_cust.disabled = 1;
+			document.iform.endport_cust.disabled = 0;
+			document.iform.localbeginport.disabled = 0;
+			document.iform.localbeginport_cust.disabled = 0;
 		}
 		if(document.iform.endport_cust.value == customarray[i]) {
 			document.iform.endport_cust.value = customarray[i];
@@ -53,6 +56,9 @@ function check_for_aliases() {
 			document.iform.endport_cust.disabled = 1;
 			document.iform.localbeginport.disabled = 1;
 			document.iform.localbeginport_cust.disabled = 1;
+			document.iform.endport_cust.disabled = 0;
+			document.iform.localbeginport.disabled = 0;
+			document.iform.localbeginport_cust.disabled = 0;
 		}
 		if(document.iform.endport.value == customarray[i]) {
 			document.iform.endport_cust.value = customarray[i];
@@ -60,6 +66,9 @@ function check_for_aliases() {
 			document.iform.endport_cust.disabled = 1;
 			document.iform.localbeginport.disabled = 1;
 			document.iform.localbeginport_cust.disabled = 1;
+			document.iform.endport_cust.disabled = 0;
+			document.iform.localbeginport.disabled = 0;
+			document.iform.localbeginport_cust.disabled = 0;
 		}
 	}
 }