DOM基础教程之事件类型

<script language="javascript">
            function handle(oEvent) {
                var disp = document.getElementById("display");
                if (window.event) oEvent = window.event; //处理兼容性，获得对象
                disp.innerHTML += "鼠标事件名称" + oEvent.type + "<br>";
            }
            window.onload = function() {
                var oP = document.getElementById("box");
                oP.onmousedown = handle;
                oP.onmouseover = handle;
                oP.onmouseup = handle;
                oP.onmouseout = handle;
                oP.onclick = handle;
                oP.ondblclick = handle;
            }
        </script>
        <div>
            <div id="box" style="width:100px;height:100px;background:#ddd;">
                box内容
            </div>
            <p id="display"></p>
        </div>

<script language="javascript">
            function TestClick(oEvent) {
                var oDiv = document.getElementById("display");
                if (window.event)
                    oEvent = window.event;
                oDiv.innerHTML += oEvent.button; //输出button的值
            }
            document.onmousedown = TestClick;
            window.onload = TestClick; //测试未按下任何键
        </script>
        <div>
            <p id="display"></p>
        </div>

<script language="javascript">
            function handle(oEvent) {
                if (window.event) oEvent = window.event; //处理兼容性，获得事件对象
                var oDiv = document.getElementById("display");
                oDiv.innerHTML += oEvent.type + "&nbsp;"; //输出事件名称
            }
            window.onload = function() {
                var oTextArea = document.getElementById("textin");
                oTextArea.onkeydown = handle; //监听所有键盘事件
                oTextArea.onkeyup = handle;
                oTextArea.onkeypress = handle;
            }
        </script>
        <div>
            <textarea rows="4" cols="50" id="textin">
            </textarea>
            <p id="display"></p>
        </div>

oEvent.charCode = (oEvent.type == "keypress")?oEvent.keycode:();

<script language="javascript">
            function handle(oEvent) {
                var oDiv = document.getElementById("display");
                if (window.event) oEvent = window.event; //处理兼容性，获得事件对象
                //设置ie charcode的值
                oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
                oDiv.innerHTML += oEvent.type + "charCode" + oEvent.charCode + "keyCode" + oEvent.keyCode + "<br>"; //输出测试
            }
            window.onload = function() {
                var oTextArea = document.getElementById("textin");
                oTextArea.onkeydown = handle; //监听所有键盘事件
                oTextArea.onkeypress = handle;
            }
        </script>
        <div>
            <textarea rows="4" cols="50" id="textin">
            </textarea>
            <p id="display"></p>
        </div>