packages/Microsoft.AspNet.ScriptManager.WebForms.5.0.0/content/Scripts/WebForms/Focus.js

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//CdnPath=http://ajax.aspnetcdn.com/ajax/4.5.1/1/WebForms.js
function WebForm_FindFirstFocusableChild(control) {
    if (!control || !(control.tagName)) {
        return null;
    }
    var tagName = control.tagName.toLowerCase();
    if (tagName == "undefined") {
        return null;
    }
    var children = control.childNodes;
    if (children) {
        for (var i = 0; i < children.length; i++) {
            try {
                if (WebForm_CanFocus(children[i])) {
                    return children[i];
                }
                else {
                    var focused = WebForm_FindFirstFocusableChild(children[i]);
                    if (WebForm_CanFocus(focused)) {
                        return focused;
                    }
                }
            } catch (e) {
            }
        }
    }
    return null;
}
function WebForm_AutoFocus(focusId) {
    var targetControl;
    if (__nonMSDOMBrowser) {
        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) {
        }
    }
}
function WebForm_CanFocus(element) {
    if (!element || !(element.tagName)) return false;
    var tagName = element.tagName.toLowerCase();
    return (!(element.disabled) &&
            (!(element.type) || element.type.toLowerCase() != "hidden") &&
            WebForm_IsFocusableTag(tagName) &&

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