ECMA SCRIPT SHAREPOINT 2010

SharePoint provides two sets of JavaScript file: minified and unminified/debug version.
For example sp.js file is minified and sp.debug is minified and debug version. The default master page in SharePoint has a scriptmanager in the page and whose ScriptMode is set to auto, as a result the minified version of js file loaded.
If you want to use debug version you can add the <deployment retail="false" /> in the <system.web> section of the web.config. In the production you need to remove this entry to make sure minified version is used.

Managed Client
DLL's needed : Microsoft.SharePoint.Client.dll, Microsoft.SharePoint.Client.Runtime.dll. Find these files in the 14/ISAPI folder. Usually, the location would be at "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\ISAPI".

Silverlight
Microsoft.SharePoint.Client.Silverlight.dll and Microsoft.SharePoint.Client.Silverlight.Runtime.dll. They find at "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ClientBin".

ECMAScript
SP.js file - The file fund at "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS".

SharePoint object model syntax:-
Server side syntax        Client side syntax 

SPContext                    ClientContext
SPSite                          Site
SPWeb                        Web
SPList                          List

After saving the .js file, press Ctrl + Shift + J to update the JavaScript IntelliSense.
Tip: Sometimes, you might have to press Ctrl + Shift + J for each .js file referenced.

please replace the below lines.... : http://msdn.microsoft.com/en-us/library/ee535709.aspx
{code}
<script type=”text/ecmascript” src=”/_layouts/SP.Core.js” />
<script type=”text/ecmascript” src=”/_layouts/SP.Debug.js” />
<script type=”text/ecmascript” src=”/_layouts/SP.Runtime.Debug.js” />
{code}
With
{code}
<SharePoint:ScriptLink ID=”ScriptLink1″ Name=”sp.debug.js” LoadAfterUI=”true” Localizable=”false” runat=”server” />
{code}

<!-- http://msdn.microsoft.com/en-us/library/ff798328.aspx -->
    <script type="text/javascript" src="/_layouts/SP.debug.js" ></script>
    <%--  CreateList --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            var itemCreateInfo = new SP.ListItemCreationInformation();
            var listCreationInfo = new SP.ListCreationInformation();
            listCreationInfo.set_title('My Custom Generic List');
            listCreationInfo.set_templateType(SP.ListTemplateType.genericList);
            this.oList = web.get_lists().add(listCreationInfo);

            clientContext.load(oList, 'Title', 'Id');

            clientContext.executeQueryAsync(Function.createDelegate(this, this.onListCreateSuccess),
Function.createDelegate(this, this.onQueryFailed));
        }
        function onListCreateSuccess(sender, args) {
            alert("List title : " + this.oList.get_title() + "; List ID : " + this.oList.get_id());
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%--  CreateSite --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            var webCreateInfo = new SP.WebCreationInformation();
            webCreateInfo.set_description("All about Rare solutions.");
            webCreateInfo.set_language(1033);
            webCreateInfo.set_title("Rare Solutions - SharePoint and .NET");
            webCreateInfo.set_url("RareSolutionsSharePoint");
            webCreateInfo.set_useSamePermissionsAsParentSite(true);
            webCreateInfo.set_webTemplate("BLOG#0");

            this.oNewWebsite = this.web.get_webs().add(webCreateInfo);

            clientContext.load(this.oNewWebsite, 'ServerRelativeUrl', 'Created');

            clientContext.executeQueryAsync(Function.createDelegate(this, this.onCreateWebSuccess),

Function.createDelegate(this, this.onQueryFailed));
        }
        function onCreateWebSuccess(sender, args) {
            alert("Web site url : " + this.oNewWebsite.get_serverRelativeUrl());
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%--     DeleteList--%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            this.list = web.get_lists().getByTitle('My custom generic list');
            list.deleteObject();

            clientContext.executeQueryAsync(Function.createDelegate(this, this.onListDeleteSuccess),

Function.createDelegate(this, this.onQueryFailed));
        }
        function onListDeleteSuccess(sender, args) {
            alert("list deleted");
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%-- DeleteListItem --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            this.list = web.get_lists().getByTitle('My custom generic list');
            this.oListItem = list.getItemById(1);
            oListItem.deleteObject();

            clientContext.executeQueryAsync(Function.createDelegate(this, this.onListItemDeleteSuccess),

Function.createDelegate(this, this.onQueryFailed));
        }
        function onListItemDeleteSuccess(sender, args) {
            alert("list item deleted");
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%--  DeleteSite --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            this.website = web.get_webs().getByTitle('Rare Solutions');
            website.deleteObject();

            clientContext.executeQueryAsync(Function.createDelegate(this, this.onSiteDeleteSuccess),

Function.createDelegate(this, this.onQueryFailed));
        }
        function onSiteDeleteSuccess(sender, args) {
            alert("site deleted");
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%-- LoadListData --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            this.list = web.get_lists().getByTitle("Images");
            clientContext.load(list, 'Title', 'Id');
            clientContext.executeQueryAsync(Function.createDelegate(this, this.onListLoadSuccess),
Function.createDelegate(this, this.onQueryFailed));
        }
        function onListLoadSuccess(sender, args) {
            alert("List title : " + this.list.get_title() + "; List ID : " + this.list.get_id());
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%-- LoadListItemsData --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            var list = web.get_lists().getByTitle("Pages");
            var camlQuery = new SP.CamlQuery();
            var q = '<View><RowLimit>5</RowLimit></View>';
            camlQuery.set_viewXml(q);
            this.listItems = list.getItems(camlQuery);
            clientContext.load(listItems, 'Include(DisplayName,Id)');
            clientContext.executeQueryAsync(Function.createDelegate(this, this.onListItemsLoadSuccess),
Function.createDelegate(this, this.onQueryFailed));
        }
        function onListItemsLoadSuccess(sender, args) {
            var listEnumerator = this.listItems.getEnumerator();
            //iterate though all of the items
            while (listEnumerator.moveNext()) {
                var item = listEnumerator.get_current();
                var title = item.get_displayName();
                var id = item.get_id();
                alert("List title : " + title + "; List ID : " + id);
            }
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%-- LoadSiteData --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            clientContext.load(web, 'Title');
            clientContext.executeQueryAsync(Function.createDelegate(this, this.onSiteLoadSuccess), Function.createDelegate(this, this.onQueryFailed));
        }
        function onSiteLoadSuccess(sender, args) {
            alert("site title : " + web.get_title());
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%--  UpdateList --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            this.list = web.get_lists().getByTitle('My custom generic list');
            list.set_description('My custom generic list description');
            list.update();
            clientContext.load(list, 'Description');
            clientContext.executeQueryAsync(Function.createDelegate(this, this.onSiteLoadSuccess), Function.createDelegate(this, this.onQueryFailed));
        }
        function onSiteLoadSuccess(sender, args) {
            alert("list description : " + this.list.get_description());
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }</script>
    ​
    <%--  UpdateListItem --%>
    <script type="text/javascript">
        var clientContext = null;
        var web = null;
        ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
        function Initialize() {
            clientContext = new SP.ClientContext.get_current();
            web = clientContext.get_web();
            this.list = web.get_lists().getByTitle('My custom generic list');
            this.oListItem = list.getItemById(1);
            oListItem.set_item('Title', 'Praveen Battula Updated');
            oListItem.update();

            clientContext.executeQueryAsync(Function.createDelegate(this, this.onUpdateListItemSuccess), Function.createDelegate(this, this.onQueryFailed));
        }
        function onUpdateListItemSuccess(sender, args) {
            alert("list item updated");
        }

        function onQueryFailed(sender, args) {
            alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
        }
</script>

Date Comparison ASP.NET + JAVA SCRIPT

Download Ajax Control Tool Kit form here
http://ajaxcontroltoolkit.codeplex.com/releases/view/33804

How to Add Ajax Toolkit to SharePoint Web.Config Refer below Link
http://inspiredbytechnology.com/using-ajax-control-toolkit-sharepoint-2010/

<%@ Register Assembly="AjaxControlToolkit, Version=3.0.30930.28736, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"
    Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>


<script type="text/javascript">
        function ValidateDates(sender, args) {
            var fromDate = document.getElementById('<%= txtMyDate.ClientID %>').value;

            var validformat = /^\d{2}\/\d{2}\/\d{4}$/
            if (!validformat.test(fromDate)) {

                sender.errormessage = "Invalid Date Format. Please correct and submit again. ";
                args.IsValid = false;
                return false;
            }
            else {
                var dayfield = fromDate.split("/")[0]
                var monthfield = fromDate.split("/")[1]
                var yearfield = fromDate.split("/")[2]
                var dayobj = new Date(yearfield, monthfield - 1, dayfield)
                if ((dayobj.getMonth() + 1 != monthfield) || (dayobj.getDate() != dayfield) || (dayobj.getFullYear() != yearfield)) {

                    sender.errormessage = "Invalid Day, Month, or Year range detected. Please correct and submit again. ";
                    args.IsValid = false;
                    return false;
                }
                else {
                    var dtToday = new Date();
                    if (dayobj > dtToday) {
                        args.IsValid = false;
                        return false;
                    }
                    else {
                        args.IsValid = true;
                        return true;
                    }
                }
            }
        };  
    </script>


 <asp:ValidationSummary ID="ValidationSummary1" HeaderText="Please enter valid values for the following field(s)"
                    DisplayMode="BulletList" EnableClientScript="true" runat="server" ValidationGroup="valGroup1"
                    CssClass="error_msg" />



 <asp:TextBox ID="txtMyDate" runat="server" CssClass="myDesign"></asp:TextBox>


<img id="imgMyImage" src="/_layouts/images/MyProject/calander.png" width="20"
                                                height="20" alt="" class="icon" />
                                            <div style="width: 50px; position: relative;">
                                                <ajaxToolkit:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="txtMyDate "
                                                    Format="dd/MM/yyyy" PopupButtonID="imgMyImage" CssClass="cal_Theme1" />
                                            </div>
                                            <asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="txtMyDate"
                                                ErrorMessage="Date of Purchase" Display="None" ValidationGroup="valGroup1" Text="*">
                                            </asp:RequiredFieldValidator>
                                            <asp:CustomValidator ID="CustomDateValidator" runat="server" ErrorMessage="Please ensure that 'Date of Purchase' is lesser than or equal to 'Current Date'."
                                                ClientValidationFunction="ValidateDates" Display="None" ValidationGroup="valGroup1"> </asp:CustomValidator>



<asp:Button ID="btnSave" runat="server" Text="Add" OnClick="btnSave_Click" CssClass="button"
                                                ValidationGroup="valGroup1" />
-----------------------------------------------------------------------------------------------------------


<html>
<head>
<script  language="javascript">
function cal()
{
document.f1.y1.value= mydiff(document.f1.n1.value,document.f1.n2.value,"days");
}
function mydiff(date1,date2,interval) {
var second=1000, minute=second*60, hour=minute*60, day=hour*24, week=day*7;
    date1 = new Date(date1);
    date2 = new Date(date2);
    var timediff = date2 - date1;
        return Math.floor(timediff / day);
}        
</script>
</head>
<body>

<form name="f1">
       enter From Date:<input type="text" name="n1">
   <br>enter To Date:<input type="text" name="n2">
   <br>No Of Days: <input type="text" name="y1">
   <input type="button"  value="Get Days"  name="ab" onclick="cal();">
</form>
</body>
</html>

Property or indexer 'Microsoft.SharePoint.SPListItem.Title' cannot be assigned to -- it is read only

Property or indexer 'Microsoft.SharePoint.SPListItem.Title' cannot be assigned to -- it is read only :-



 protected void btn1_Click(object sender, EventArgs e)
        {
            using (SPSite site = new SPSite(SPContext.Current.Site.Url))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    SPList list = web.Lists["Announcements"];
                    SPListItem item = list.AddItem();
                    item["Title"] = "New Announcement";
                    item.Update();
                }
            }
        }

SharePoint Version