Help - projected deleted

I have deleted ,accidentally, my project.
I have builded project in web player.
Please help my.

Sorry to hear that. Since this is the documentation forum, I guess the best advice I can give to you is http://docs.unity3d.com/Manual/ExternalVersionControlSystemSupport.html

Not to be rude, but I think everyone has tried to accidentally lose data, either on a lost USB stick, crashed harddisk etc, and then you learn to backup your data or use version control (which should be hosted on another machine/externally ofc).

Depending on how you deleted your files, they might be in the recycle/trash bin on your machine, or alternatively search for “recover deleted files” on Google.

Hope you get your files back, but still my advice is you start using a version control system as well as make sure you have your data backed up.

Best regards, Rasmus

Can I recover project with builded web player game?
And I have used Shift+Delete:((((

This is HTML Code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Unity Web Player | Assets</title>
        <script type='text/javascript' src='https://ssl-webplayer.unity3d.com/download_webplayer-3.x/3.0/uo/jquery.min.js'></script>
        <script type="text/javascript">
        <!--
        var unityObjectUrl = "http://webplayer.unity3d.com/download_webplayer-3.x/3.0/uo/UnityObject2.js";
        if (document.location.protocol == 'https:')
            unityObjectUrl = unityObjectUrl.replace("http://", "https://ssl-");
        document.write('<script type="text\/javascript" src="' + unityObjectUrl + '"><\/script>');
        -->
        </script>
        <script type="text/javascript">
        <!--
            var config = {
                width: 960,
                height: 600,
                params: { enableDebugging:"0" }
             
            };
            var u = new UnityObject2(config);

            jQuery(function() {

                var $missingScreen = jQuery("#unityPlayer").find(".missing");
                var $brokenScreen = jQuery("#unityPlayer").find(".broken");
                $missingScreen.hide();
                $brokenScreen.hide();
             
                u.observeProgress(function (progress) {
                    switch(progress.pluginStatus) {
                        case "broken":
                            $brokenScreen.find("a").click(function (e) {
                                e.stopPropagation();
                                e.preventDefault();
                                u.installPlugin();
                                return false;
                            });
                            $brokenScreen.show();
                        break;
                        case "missing":
                            $missingScreen.find("a").click(function (e) {
                                e.stopPropagation();
                                e.preventDefault();
                                u.installPlugin();
                                return false;
                            });
                            $missingScreen.show();
                        break;
                        case "installed":
                            $missingScreen.remove();
                        break;
                        case "first":
                        break;
                    }
                });
                u.initPlugin(jQuery("#unityPlayer")[0], "Site game.unity3d");
            });
        -->
        </script>
        <style type="text/css">
        <!--
        body {
            font-family: Helvetica, Verdana, Arial, sans-serif;
            background-color: white;
            color: black;
            text-align: center;
        }
        a:link, a:visited {
            color: #000;
        }
        a:active, a:hover {
            color: #666;
        }
        p.header {
            font-size: small;
        }
        p.header span {
            font-weight: bold;
        }
        p.footer {
            font-size: x-small;
        }
        div.content {
            margin: auto;
            width: 960px;
        }
        div.broken,
        div.missing {
            margin: auto;
            position: relative;
            top: 50%;
            width: 193px;
        }
        div.broken a,
        div.missing a {
            height: 63px;
            position: relative;
            top: -31px;
        }
        div.broken img,
        div.missing img {
            border-width: 0px;
        }
        div.broken {
            display: none;
        }
        div#unityPlayer {
            cursor: default;
            height: 600px;
            width: 960px;
        }
        -->
        </style>
        <style>
body {
    background-image: url("p.jpg");
}
.myButton {
    -moz-box-shadow: 1px 2px 2px 1px #040745;
    -webkit-box-shadow: 1px 2px 2px 1px #040745;
    box-shadow: 1px 2px 2px 1px #040745;
    background-color:#0053fa;
    -moz-border-radius:5px;
    -webkit-border-radius:5px;
    border-radius:5px;
    border:1px solid #005eff;
    display:inline-block;
    cursor:pointer;
    color:#ffffff;
    font-family:Courier New;
    font-size:16px;
    font-weight:bold;
    padding:15px 31px;
    text-decoration:none;
    text-shadow:0px 1px 5px #080324;
}
.myButton:hover {
    background-color:#0091ff;
}
.myButton:active {
    position:relative;
    top:1px;
}


.myButton {
    border: 2px solid #000099;
}
</style>
    </head>
    <body>
        <div class="content">
            <div id="unityPlayer">
                <div class="missing">
                    <a href="http://unity3d.com/webplayer/" title="Unity Web Player. Install now!">
                        <img alt="Unity Web Player. Install now!" src="http://webplayer.unity3d.com/installation/getunity.png" width="193" height="63" />
                    </a>
                </div>
                <div class="broken">
                    <a href="http://unity3d.com/webplayer/" title="Unity Web Player. Install now! Restart your browser after install.">
                        <img alt="Unity Web Player. Install now! Restart your browser after install." src="http://webplayer.unity3d.com/installation/getunityrestart.png" width="193" height="63" />
                    </a>
                </div>
            </div>
        </div>
    <a href="index.html" class="myButton">Inapoi</a>
    </body>
</html>

Google for “unity decompiler”. Haven’t tried any of the suggested solutions, so cannot help you further.