已经通过了,看看吧,说不定对你有所帮助。
走过路过,表要错过,瞧一瞧,看一看,不要钱。
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" Content="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> <!--当点击相应按钮,执行相应操作,为按钮添加相应事件--> <input type="button" onclick="changeColor()" value="改变颜色" > <input type="button" onclick="changeSize()" value="改变宽高" > <input type="button" onclick="hideTxt()" value="隐藏内容" > <input type="button" onclick="showTxt()" value="显示内容" > <input type="button" onclick="comeBack()" value="取消设置" > </form> <script type="text/javascript"> //定义"随机颜色"的函数 function randomColor() { //16进制方式表示颜色0-F var arrHex = ["0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"]; var strHex = "#"; var index; for(var i = 0; i < 6; i++) { //取得0-15之间的随机整数 index = Math.round(Math.random() * 15); strHex += arrHex[index]; } return strHex; } //定义"改变颜色"的函数 function changeColor(){ var mychar = document.getElementById("txt"); mychar.style.color = randomColor(); } //定义"改变宽高"的函数 function changeSize(){ var mychar = document.getElementById("txt"); mychar.style.width = "700px"; mychar.style.height = "450px"; } //定义"隐藏内容"的函数 function hideTxt(){ var mychar = document.getElementById("txt"); mychar.style.display = "none"; } //定义"显示内容"的函数 function showTxt(){ var mychar = document.getElementById("txt"); mychar.style.display = "block"; } //定义"取消设置"的函数 function comeBack(){ var mystr = confirm("取消设置"); var mychar = document.getElementById("txt"); if(mystr == true){ mychar.removeAttribute("style"); } else{ } } </script> </body> </html>