update dhcp check

web/js/config.js

@@ -125,6 +125,8 @@ function ValidateIPaddress(ipaddress) {
 
 function validData(inputName) {
     var ip = $("input[name='" + inputName + "']").val();
+    if (ip == "" && document.getElementById('dhcp_check').checked)
+        return true;
     if (!ValidateIPaddress(ip)) {
         common.error(inputName, "");
         return false;
@@ -160,6 +162,7 @@ function changeIP(e) {
                 gateway: $("input[name='gateway']").val(),
                 dns1: $("input[name='dns1']").val(),
                 dns2: $("input[name='dns2']").val(),
+                dhcp: document.getElementById('dhcp_check').checked
             },
             success: function (data) {
                 common.modalBlock(false);