<telerik:RadSlider RenderMode="Lightweight" runat="server" ID="RadSlider1"
            Orientation="Horizontal" MinimumValue="0" MaximumValue="30"
            Width="370px" Height="70px" ItemType="tick"
            SmallChange="1" LargeChange="1">
        </telerik:RadSlider>

            <telerik:RadDockLayout runat="server" ID="RadDockLayout1" EnableLayoutPersistence="true" RenderingMode="Lightweight"
                LayoutPersistenceRepositoryType="Cookies" LayoutRepositoryID="repID20210406_1">
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock1" runat="server"
                    UniqueName="RadDock1" AutoPostBack="true">
                    <ContentTemplate>
                        dock 1
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock2" runat="server"
                    UniqueName="RadDock2" AutoPostBack="true">
                    <ContentTemplate>
                        dock 2
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock3" runat="server"
                    UniqueName="RadDock3" AutoPostBack="true">
                    <ContentTemplate>
                        dock 3
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock4" runat="server"
                    UniqueName="RadDock4" AutoPostBack="true">
                    <ContentTemplate>
                        dock 4
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock5" runat="server"
                    UniqueName="RadDock5" AutoPostBack="true">
                    <ContentTemplate>
                        dock 5
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock6" runat="server"
                    UniqueName="RadDock6" AutoPostBack="true">
                    <ContentTemplate>
                        dock 6
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock7" runat="server"
                    UniqueName="RadDock7" AutoPostBack="true">
                    <ContentTemplate>
                        dock 7
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock8" runat="server"
                    UniqueName="RadDock8" AutoPostBack="true">
                    <ContentTemplate>
                        dock 8
                    </ContentTemplate>
                </telerik:RadDock>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock9" runat="server"
                    UniqueName="RadDock9" AutoPostBack="true">
                    <ContentTemplate>
                        dock 9
                    </ContentTemplate>
                </telerik:RadDock>

                <%--The state will be persisted of you comment the dock below--%>
                <telerik:RadDock RenderMode="Lightweight" ID="RadDock10" runat="server"
                    UniqueName="RadDock10" AutoPostBack="true">
                    <ContentTemplate>
                        dock 10
                    </ContentTemplate>
                </telerik:RadDock>

            </telerik:RadDockLayout>

<telerik:RadMonthYearPicker EnableAriaSupport="true" EnableKeyboardNavigation="true"  ID="from_date" name="from_date" runat="server" RenderMode="Lightweight" 
            Width="150px" ToolTip="" Height="40px">
            <DateInput ID="fd_input" DateFormat="MM/yyyy" runat="server" Enabled="true">
            </DateInput>
            </telerik:RadMonthYearPicker>
            <asp:RequiredFieldValidator runat="server" id="v_from_date" ControlToValidate="from_date" ErrorMessage="- Required" CssClass="validator" />
            <asp:RegularExpressionValidator ID="reg_v_from_date" runat="server" ErrorMessage="Invalid From Date" ControlToValidate="from_date" Text="Format: MM/YYYY" ValidationExpression="^\d{4}-\d{2}-\d{2}$" CssClass="validator"></asp:RegularExpressionValidator>

Uncaught RangeError: Maximum call stack size exceeded
    at Function.Array.addRange 
    at Telerik.Web.UI.RadAjaxManager._executePendingRequest 
    at Object._endRequest 
    at Array.<anonymous> 
    at Sys.WebForms.PageRequestManager._endPostBack 
    at Sys.WebForms.PageRequestManager._scriptsLoadComplete 
    at Sys.WebForms.PageRequestManager.<anonymous>   
    at Sys._ScriptLoader._loadScriptsInternal 

<script>
    Telerik.Web.UI.RadAjaxControl.prototype._executePendingRequest = function () {
        var pendingRequest = Array.dequeue(this._requestQueue);

        var eventTarget = pendingRequest[0];
        var eventArgument = pendingRequest[1];

        if (this._requestQueue.length > 0 && this.__id != "") {
            var currentAjaxControl = $find(this.__id);
            if (currentAjaxControl) {
                Array.addRange(currentAjaxControl._requestQueue, this._requestQueue);
                // optional, uncomment if issue persists
                //if (currentAjaxControl._requestQueue.length > currentAjaxControl._requestQueueSize) {
                //    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice#parameters 
                //    // using negative index for start to get the last N elements
                //    currentAjaxControl._requestQueue =
                //        currentAjaxControl._requestQueue.slice(-currentAjaxControl._requestQueueSize)
                //}
            }
        }

        var requestManager = Sys.WebForms.PageRequestManager.getInstance();
        requestManager._doPostBack(eventTarget, eventArgument);
    }
</script>

<script>
    if (kendo && kendo.spreadsheet && kendo.spreadsheet.SheetEditor) {
        kendo.spreadsheet.SheetEditor.fn.activate = function (options) {
            var viewElement = this.view.element, viewWidth, scrollerElement, scrollbarWidth;
            this._active = true;
            this._rect = options.rect;
            this._range = options.range;
            this.cellInput.position(options.rect);
            this.cellInput.resize(options.rect);
            this.cellInput.tooltip(options.tooltip);
            this.cellInput.activeCell = this.barInput.activeCell = this._range.topLeft();
            this.cellInput.activeSheet = this.barInput.activeSheet = this._range._sheet;
            if (viewElement) {
                viewWidth = viewElement.width();
                scrollerElement = viewElement.find('.' + kendo.spreadsheet.View.classNames.scroller)[0];
                scrollbarWidth = scrollerElement.offsetWidth - scrollerElement.clientWidth;
                this.cellInput.element.css('max-width', viewWidth - scrollbarWidth - this.cellInput.element.position().left + 'px');
            }
            this.trigger('activate');
            return this;
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style type="text/css">
        .RadRadioButtonList button {
            font-size: 26px;
        }
    </style>
     
</head>
<body>
    <form id="form1" runat="server">
            <telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>
       
        <telerik:RadRadioButtonList ID="RadRadioButtonList1"  runat="server"  AutoPostBack="False" Height="196px"  Skin="MetroTouch" RenderMode="Lightweight">   
            <Items>
                <telerik:ButtonListItem Text="Sample1" Value="1"  />
                <telerik:ButtonListItem Text="Sample2" Value="2" />
                <telerik:ButtonListItem Text="Sample3" Value="3" />
            </Items>
        </telerik:RadRadioButtonList>
    </form>
</body>
</html>

function pageLoadHandler() {
    var spreadsheet = $find("<%= RadSpreadsheet1.ClientID %>").get_kendoWidget();
    var sheet = spreadsheet.sheetByName("Sheet1");
    spreadsheet.activeSheet(sheet);
        
    // Sys.Application.remove_load(pageLoadHandler);  
}
Sys.Application.add_load(pageLoadHandler);