js 小知识

    window事件
    　　window.onload=function(){alert("页面创建中****");};
        window.onunload=function(){alert("页面卸载中****");};
        window.onbeforedeactivate =function(){alert("页面卸载中****")};

定时

        window.status="xxxxx"
        var now =new Date().toLocaleString();
        window.status=now;

        function showTime()
        {
            var now=new Date().toLocaleString();
            window.status=now;
            //window.document.write(window.status+"<br/>");
            window.document.getElementById("time").innerText=window.status;

        }
        //window.setInterval("showTime()",1000);

        //window.location.href="http://127.0.0.1:8080/bbs";
        
        var size=window.history.length;            //浏览器的历史栏，它存放的是该浏览器窗口已访问过的网页内容
        window.document.write(size);
        
        //打开新的窗口
        var newWindow=window.open("function.html");
        
        newWindow.close();

触发事件，表单提交是否

    <form name="register" action="http://127.0.0.1:8080/bbs" method="post" onsubmit="return checkRegister()">
        <input type="text" name="username" /> 
        <input type="submit" value="注册" />
    </form>

    <form action="#" method="post" onsubmit="return checkLogin()">
        <input type="text" name="username" />
         <input type="submit" value="登录" />
    </form>

    <script type="text/javascript">
        function checkRegister()
        {
            var name=window.document.register.username.value;
            alert(name);
            return false;
        }
        function checkLogin()
        {
            var name=window.document.forms[1].username.value;
            alert(name);
            return false;
        }
    </script>

打开新窗口

    <script type="text/javascript">

        
        //打开新的窗口
        var newWindow=window.open("function.html");
        
        newWindow.close();
    </script>