console 命令行工具 X clear

console

window.addEventListener("load",function(){
    var oOpenBaiduBtn=this.document.getElementById("openBaiduBtn");
    var oBaiduWin=null;
    oOpenBaiduBtn.addEventListener("click",function(){
        oBaiduWin=window.open("http://www.baidu.com","_blank");
    });

    var oCloseBaiduBtn=this.document.getElementById("closeBaiduBtn");
    oCloseBaiduBtn.addEventListener("click",function(){
        oBaiduWin.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("https://www.baidu.com/?tn=15007414_8_dg");
        }
    });

    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="openBaiduBtn">打开百度</button>
        <button id="closeBaiduBtn">关闭百度</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>