99乘法表用js如何写-tutorial js-php.cn

99乘法表用js如何写

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Lepaskan： 2017-06-21 09:43:39

asal

1347 orang telah melayarinya

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>body,div,ul,li{
            margin:0;
            padding: 0;
            font-family: Arial;
            font-size:12px;
        }
        ul li{
            list-style:none;
        }
        #tab{
            position:absolute;
            top:50%;
            left:50%;
            padding:10px;
            margin-left:-460px;
            margin-top:-145px;
            width:900px;
            height:270px;
            border:1px solid red;
            border-radius:10px;
        }
        #tab li{
            height:30px;
            line-height: 30px;

        }
        #tab li span{
            width:100px;
            height:30px;
            text-align:center;
            display: inline-block;
        }</style>
</head>
<body>
    <div id=&#39;tab&#39;>
        <ul>
            
        </ul>
    </div>
    <script type=&#39;text/javascript&#39;>var oTab = document.getElementById('tab');var str = '';
        str+="<ul>"for(var i = 1;i<=9;i++){var val = "c1";switch(i%3){case 0:
                        val = "c1";break;case 1:
                        val = "c2";break;default:
                        val = "c3";
                }
                str+="<li class=&#39;"+val+"&#39;>";for(var j = 1;j<=i;j++){
                        str+="<span>";
                            str+=""+j+"*"+i+" = "+(j*i)+""str+="</span>"}
                str+="</li>"}
        str+="</ul>"oTab.innerHTML = str;//字符串拼接的第一条黄金法则：单双不能同时用。必须间隔出现//如果一个字符串中需要增加一个变量，看最外面是""还是'',如果是""，那么直接的"+变量+"。如果是单引号'',那么直接的'"+变量+"'</script>
</body>
</html>

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