Javascript屏蔽鼠标的右键的两种方法。

<script language="javascript">
            function blockright(oEvent) {
                var oDiv = document.getElementById("display");
                if (window.event) oEvent = window.event; //处理兼容性，获得事件对象
                if (oEvent.button == 2)
                    alert("不能使用");
            }
            window.onload = function() {
                document.onmousedown = blockright;
            }
        </script>
        <div>
            <textarea rows="4" cols="50" id="textin">
            </textarea>
            <p id="display"></p>
        </div>

<script language="javascript">
            function blockright(oEvent) {
                if (window.event) {
                    oEvent = window.event; //处理兼容性，获得事件对象
                    oEvent.returnValue = false;
                }else
                oEvent.preventDefault();
            }
            window.onload = function() {
                document.oncontextmenu = blockright;
            }
        </script>