------kaynak görüntüleme iptal-----
  <   script type="text/javascript"   >
                //                 document.onkeypress = function(event) {
                    event = (event || window.event);
                    if (event.keyCode === 123) {
                        //alert('No F-12');
                        return false;
                    }
                };
                document.onmousedown = function(event) {
                    event = (event || window.event);
                    if (event.keyCode === 123) {
                        //alert('No F-keys');
                        return false;
                    }
                };
                document.onkeydown = function(event) {
                    event = (event || window.event);
                    if (event.keyCode === 123) {
                        //alert('No F-keys');
                        return false;
                    }
                };
                function contentprotector() {
                    return false;
                }
                function mousehandler(e) {
                    var myevent = (isNS) ? e : event;
                    var eventbutton = (isNS) ? myevent.which : myevent.button;
                    if ((eventbutton === 2) || (eventbutton === 3))
                        return false;
                }
                document.oncontextmenu = contentprotector;
                document.onmouseup = contentprotector;
                var isCtrl = false;
                window.onkeyup = function(e)
                {
                    if (e.which === 17)
                        isCtrl = false;
                }
                window.onkeydown = function(e)
                {
                    if (e.which === 17)
                        isCtrl = true;
                    if (((e.which === 85) || (e.which === 65) || (e.which === 80) || (e.which === 88) || (e.which === 67) || (e.which === 86) || (e.which === 83)) && isCtrl === true)
                    {
                        return false;
                    }
                }
                isCtrl = false;
                document.ondragstart = contentprotector;
                //]]>

< /script >
------kaynak görüntüleme iptal-----