https://www.worldtimeserver.com/WebResource.axd?d=YjrmM-gRHyg3b5k4…Onypp2BP4x7kyIcysUVQ01&t=636776725224055265

1function WebForm_FindFirstFocusableChild(control) {
2    if (!control || !(control.tagName)) {
3        return null;
4    }
5    var tagName = control.tagName.toLowerCase();
6    if (tagName == "undefined") {
7        return null;
8    }
9    var children = control.childNodes;
10    if (children) {
11        for (var i = 0; i < children.length; i++) {
12            try {
13                if (WebForm_CanFocus(children[i])) {
14                    return children[i];
15                }
16                else {
17                    var focused = WebForm_FindFirstFocusableChild(children[i]);
18                    if (WebForm_CanFocus(focused)) {
19                        return focused;
20                    }
21                }
22            } catch (e) {
23            }
24        }
25    }
26    return null;
27}
28function WebForm_AutoFocus(focusId) {
29    var targetControl;
30    if (__nonMSDOMBrowser) {
31        targetControl = document.getElementById(focusId);
32    }
33    else {
34        targetControl = document.all[focusId];
35    }
36    var focused = targetControl;
37    if (targetControl && (!WebForm_CanFocus(targetControl)) ) {
38        focused = WebForm_FindFirstFocusableChild(targetControl);
39    }
40    if (focused) {
41        try {
42            focused.focus();
43            if (__nonMSDOMBrowser) {
44                focused.scrollIntoView(false);
45            }
46            if (window.__smartNav) {
47                window.__smartNav.ae = focused.id;
48            }
49        }
50        catch (e) {
51        }
52    }
53}
54function WebForm_CanFocus(element) {
55    if (!element || !(element.tagName)) return false;
56    var tagName = element.tagName.toLowerCase();
57    return (!(element.disabled) &&
58            (!(element.type) || element.type.toLowerCase() != "hidden") &&
59            WebForm_IsFocusableTag(tagName) &&
60            WebForm_IsInVisibleContainer(element)
61            );
62}
63function WebForm_IsFocusableTag(tagName) {
64    return (tagName == "input" ||
65            tagName == "textarea" ||
66            tagName == "select" ||
67            tagName == "button" ||
68            tagName == "a");
69}
70function WebForm_IsInVisibleContainer(ctrl) {
71    var current = ctrl;
72    while((typeof(current) != "undefined") && (current != null)) {
73        if (current.disabled ||
74            ( typeof(current.style) != "undefined" &&
75            ( ( typeof(current.style.display) != "undefined" &&
76                current.style.display == "none") ||
77                ( typeof(current.style.visibility) != "undefined" &&
78                current.style.visibility == "hidden") ) ) ) {
79            return false;
80        }
81        if (typeof(current.parentNode) != "undefined" &&
82                current.parentNode != null &&
83                current.parentNode != current &&
84                current.parentNode.tagName.toLowerCase() != "body") {
85            current = current.parentNode;
86        }
87        else {
88            return true;
89        }
90    }
91    return true;
92}