<!DOCTYPE HTML> <html>...-慕课网

                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JavaScript入门篇

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="txttent-Type" txttent="text/html; charset=utf-8" />
<title>javascript</title>
<style type="text/css">
body{font-size:12px;}
#txt{
    height:400px;
    width:600px;
   border:#333 solid 1px;
   padding:5px;}
p{
   line-height:18px;
   text-indent:2em;}
</style>
</head>
<body>
<h2 id="con">JavaScript课程</H2>
<div id="txt">
     <h5>JavaScript为网页添加动态效果并实现与用户交互的功能。</h5>
        <p>1. JavaScript入门篇，让不懂JS的你，快速了解JS。</p>
        <p>2. JavaScript进阶篇，让你掌握JS的基础语法、函数、数组、事件、内置对象、BOM浏览器、DOM操作。</p>
        <p>3. 学完以上两门基础课后，在深入学习JavaScript的变量作用域、事件、对象、运动、cookie、正则表达式、ajax等课程。</p>
</div>
<form>

    <input type="button" value="改变颜色" onclick="changecolor()" />
    <input type="button" value="改变宽高" onclick="changew_h()" />
    <input type="button" value="隐藏内容"onclick="hidetext() " />
    <input type="button" value="显示内容" onclick="showtext()" />
    <input type="button" value="取消设置"onclick="cancelsetting()" />
</form>
<script type="text/javascript">
var message=document.getElementById("txt");

function changecolor(){
    var yourcolor=prompt("enter color you want:","");
    var yourbackground=prompt("enter background you want:","");
    message.style.color=yourcolor;
    message.style.backgroundColor=yourbackground;
}//定义"改变颜色"的函数
function changew_h(){
    var yourweight=prompt("enter weigh you want:","");
    var yourheight=prompt("enter height you want:","");
    message.style.weigth=yourweight;
    message.style.height=yourheight;
}//定义"改变宽高"的函数
function hidetext(){
    message.style.display="none";
}//定义"隐藏内容"的函数

function showtext(){
    message.style.display="block";
}//定义"显示内容"的函数
function cancelsetting(){
    var ask=confirm("are you want to cancel your settings?");
    if(ask==true){
        message.removeAttribute("style");
    }
    else return;
}

//定义"取消设置"的函数

</script>
</body>
</html>