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  • 5月25日 DOM

    练习一:输入答案,弹出是否正确。

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head>
    
    <body>
    
    <form>中国成立于哪一年?<input type="text" daan="1949年" id="t" name="t"/>
    <input type="button" onclick="check()" id="t1" name="t1" value="检查答案"/>
    </form>
    
    </body>
    </html>
    <script>
    function check()
    {
        var a=document.getElementById("t");
        var b=a.value;
        var c=a.getAttribute("daan");
        if(b==c)
        {
            alert("恭喜您答对了!");
        }
        else
        {
            alert("对不起,您回答错了!");
        }
    }
    </script>

    练习二:倒计时10秒,设置同意按钮,10秒倒计时结束是按钮可用,否则不能用,这里用操作属性:disable改变按钮状态,当disable="disable"时,按钮不可用。

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head>
    
    <body>
    <form><input type="submit" id="t" name="t" value="同意(10)" disabled="disabled" /></form>
    
    </body>
    </html>
    <script type="application/javascript" >
    var n=10;
    var a=document.getElementById("t");
    function miao()
    {
        n--;
        if(n==0)
        {
            a.removeAttribute("disabled");
            a.value="同意";
            return;
        }
        else
        {
            a.value="同意("+n+")";
            window.setTimeout("miao()",1000);
        }
    }
    window.setTimeout("miao()",1000);
    
    </script>

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  • 原文地址:https://www.cnblogs.com/juyangchao12/p/5528855.html
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