Microsoft JScript runtime error: ‘__nonMSDOMBrowser’ is undefined

[M-Dayyan]

I'm working with a WebService (https://bmiutility.bmi.ir/merchantutility.asmx).
Whenever I use this webserivce the following exception has occurred!!!

As I found this exception doesn't concern to my WebApp files! it concerns to the WebService files.


Microsoft JScript runtime error: '__nonMSDOMBrowser' is undefined

The exception has occurred in the following function :
function WebForm_AutoFocus(focusId)
{
var targetControl;
if (__nonMSDOMBrowser) {//Exception
targetControl = document.getElementById(focusId);
}
else {
targetControl = document.all[focusId];
}
var focused = targetControl;
if (targetControl && (!WebForm_CanFocus(targetControl)) ) {
focused = WebForm_FindFirstFocusableChild(targetControl);
}
if (focused) {
try {
focused.focus();
if (__nonMSDOMBrowser) {
focused.scrollIntoView(false);
}
if (window.__smartNav) {
window.__smartNav.ae = focused.id;
}
}
catch (e) {
}
}

27322
What's wrong with it ? Am I missing something ?