console 命令行工具 X clear

console

window.addEventListener("load", function(){

    var oOpen4399Btn = this.document.getElementById("open4399Btn");
    var oBaiduWin = null;
    oOpen4399Btn.addEventListener("click", function(){
        o4399Win = window.open("http://www.4399.com", "_blank");
    });

    var oClose4399Btn = this.document.getElementById("close4399Btn");
    oClose4399Btn.addEventListener("click", function(){
        o4399Win.close();
    });

    var oOpenNewBtn = this.document.getElementById("openNewBtn");
    var oNewWin = null;
    oOpenNewBtn.addEventListener("click", function(){
        oNewWin = window.open();
    })

    var oChangeNewBtn = this.document.getElementById("changeNewBtn");
      oChangeNewBtn.addEventListener("click", function(){
        oNewWin.document.title = "新窗口";
        oNewWin.document.body.innerHTML="<div><p><strong>Hi</strong>, I'm a new window</p></div>";
        oNewWin.document.body.style.color="blue";
    })

    var oCloseNewBtn = this.document.getElementById("closeNewBtn");
    oCloseNewBtn.addEventListener("click", function(){
        oNewWin.close();
    });

    var oAlertBtn = this.document.getElementById("alertBtn");
    oAlertBtn.addEventListener("click",function(){
        window.alert("我是告警窗口")
    });

    var oConfirmBtn = this.document.getElementById("confirmBtn");
    oConfirmBtn.addEventListener("click",function(){
        var bConfirmed = window.confirm("你要不要打开百度？");
        if(bConfirmed) {
            window.open("http://www.baidu.com");
        }
    });

    var oPromptBtn = this.document.getElementById("promptBtn");
    oPromptBtn.addEventListener("click",function(){
        var strText = window.prompt("请输入提示：");
        if(strText) {
            var oText = window.document.getElementById("text");
            oText.innerHTML = strText;
        }
    });


})

<!DOCTYPE html> 
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <script>
    </script>
</head>
<body>
    <div>
        <button id="open4399Btn">打开4399</button>
        <button id="close4399Btn">关闭4399</button>
    </div>
    <br/>
    <div>
        <button id="openNewBtn">打开空白页面</button>
        <button id="changeNewBtn">绘制空白页面</button>
        <button id="closeNewBtn">关闭空白页面</button>
    </div>
    <br/>
    <div>
        <button id="alertBtn">打开告警窗口</button>
        <button id="confirmBtn">打开确认窗口</button>
        <br/>
        <div>
            <button id="promptBtn">打开提示窗口</button>
            <label>提示文字:</label><p id="text"></p>
        </div>
    </div>
</body>
</html>