Sharepoint 2013 - IE11 Issues

Client Object Model Javascript and web url issue:

o   I found the solution. Check the view source of any sharepoint page in SP2013. I found a javascript variable 'L_Menu_BaseUrl' which holds the web relative Url.

o   SharePoint 2013 with IE11: L_Menu_BaseUrl is undefined. Unfortunately these variable disappeared when I updated to IE 11.

o   This problem is present in SP2013 in IE11 only, and the strange thing is that if you switch on the compatibility mode (or changes the user agent string using F12) the variables return.

o   So I replaced the L_Menu_BaseUrl to hidden filed value(get the server side value and pass it in the javascript hidden field variable).

Here is the sample :

<script  type="text/javascript">

function openNew(Callback) {

        var popupURL = document.getElementById('<%=hdnURL.ClientID%>').value;

        //L_Menu_BaseUrl + "/Lists/List1/NewForm.aspx";(don't use the variable when using IE11)

        var options = { url: popupURL };

        if (Callback) {

            options.dialogReturnValueCallback = Function.createDelegate(null, CloseDialog);

        }

        SP.SOD.execute('sp.ui.dialog.js', 'SP.UI.ModalDialog.showModalDialog', options);

        return false;

    }

function CloseDialog(dialogResult, returnValue) {  //if user click on OK or Save

        if (dialogResult == SP.UI.DialogResult.OK) {

            //refresh parent page

            SP.SOD.execute('sp.ui.dialog.js', 'SP.UI.ModalDialog.RefreshPage', SP.UI.DialogResult.OK);

        }

            //if user click on close or Cancel

        else if (dialogResult = SP.UI.DialogResult.cancel) {

            // Do Nothing

        }

    }

<asp:HiddenField ID="hdnURL" runat="server" />

.cs File:

 protected void Page_Load(object sender, EventArgs e)

        {           

                string currentWeb = SPContext.Current.Web.Url;

                hdnURL.Value = currentWeb + "/Lists/List1/NewForm.aspx";               

                Bind_Items();         

        }