<style> #div1 { width:240px; height:200px; border:1px solid #333; background:#f1f1f1; padding:10px; } </style> <script> window.onload = function (){ var oDiv = document.getElementById('div1'); var oStrong = document.getElementById('strong1'); var oText = document.getElementById('text1'); var oBtn = document.getElementById('btn1'); oBtn.onclick = function (){ // 原来的内容，你得给我留着，然后再加上新内容 // a = a + b // a += b // 添加：+= // oDiv.innerHTML = oDiv.innerHTML + oText.value + '<br />'; oDiv.innerHTML += oStrong.innerHTML + oText.value + '<br />'; oText.value = ''; }; }; </script> </head> <body> <div id="div1"></div> <strong id="strong1">张三：</strong> <input id="text1" type="text" /> <input id="btn1" type="button" value="提交" /> </body>
改变字体大小：
<script> window.onload = function (){ var oBtn1 = document.getElementById('btn1'); var oBtn2 = document.getElementById('btn2'); var oP = document.getElementById('p1'); var num = 14; oBtn1.onclick = function (){ num -= 2; oP.style.fontSize = num + 'px'; // JS 不允许出现"-" // padding-top paddingTop // margin-left marginLeft }; oBtn2.onclick = function (){ // num = num + 2; num += 2; oP.style.fontSize = num + 'px'; // JS 不允许出现“-“ }; }; </script> </head> <body> <input id="btn1" type="button" value="-" /> <input id="btn2" type="button" value="+" /> <p id="p1" style="font-size:16px;">10月28日晚，中央纪委监察部官网发布消息，贵州省委常委、遵义市委书记廖少华因涉嫌严重违纪违法接受组织调查。3天后中组部宣布对其免职。廖成为十八大后中纪委一连串"打虎"行动中第十一位落马的副省部级以上高官。</p> </body> </html>
图片切换：
</head> <body> <img id="img1" src="img/2.jpg" width="200" /> <script> var oImg = document.getElementById('img1'); var onOff = true; // 布尔值：true 1 false 0 oImg.onclick = function (){ // if( oImg.src == 'img/2.jpg' ){ // 有条件，就用现成的，如果没有，创造条件也得做事 if( onOff ){ oImg.src = 'img/4.jpg'; onOff = false; } else { oImg.src = 'img/2.jpg'; onOff = true; } }; </script> </body>
<style> p { margin:0; } body { text-align:center; } #box { width:400px; height:400px; border:10px solid #ccc; margin:50px auto 0; position:relative; } a { width:40px; height:40px; background:#fff; filter:alpha(opacity:80); opacity:0.8; position:absolute; top:160px; font-size:18px; color:#000; text-align:center; line-height:40px; text-decoration:none; } a:hover { filter:alpha(opacity:30); opacity:0.3; } #prev { left:10px; } #next { right:10px; } #p1 { width:400px; height:30px; line-height:30px; text-align:center; background:#000; color:#fff; font-size:14px; filter:alpha(opacity:80); opacity:0.8; position:absolute; bottom:0; left:0; } strong { width:400px; height:30px; line-height:30px; text-align:center; background:#000; color:#fff; font-size:14px; filter:alpha(opacity:80); opacity:0.8; position:absolute; top:0; left:0; } #img1 { width:400px; height:400px; } span { position:absolute; width:400px; height:30px; line-height:30px; text-align:center; top:-50px; left:0; font-family:'微软雅黑'; } </style> <script> window.onload = function (){ var oPrev = document.getElementById('prev'); var oNext = document.getElementById('next'); var oP = document.getElementById('p1'); var oStrong = document.getElementById('strong1'); var oImg = document.getElementById('img1'); var aBtn = document.getElementsByTagName('input'); var arrUrl = [ 'img/1.jpg', 'img/2.jpg', 'img/3.jpg', 'img/4.jpg' ]; var arrText = [ '文字一', '文字二', '文字三', '识文断字' ]; var num = 0; var onOff = true; aBtn[0].onclick = function (){ onOff = true; document.getElementsByTagName('span')[0].innerHTML = '图片可从最后一张跳转到第一张循环切换'; }; aBtn[1].onclick = function (){ onOff = false; document.getElementsByTagName('span')[0].innerHTML = '图片只能到最后一张或只能到第一张切换'; }; // 初始化 function fnTab(){ oP.innerHTML = arrText[num]; oStrong.innerHTML = num+1 + ' / ' + arrText.length; oImg.src = arrUrl[num]; } fnTab(); oPrev.onclick = function (){ num --; if( num == -1 ){ if(onOff){num = arrText.length-1;}else{ alert('这已经是第一张了，不能再往前了~~'); num = 0; } //num = arrText.length-1; } fnTab(); }; oNext.onclick = function (){ num ++; if( num == arrText.length ){ if(onOff){num = 0;}else{ alert('已经到最后一张啦~'); num = arrText.length-1; } } fnTab(); }; }; </script> </head> <body> <input type="button" value="循环切换" /> <input type="button" value="顺序切换" /> <div id="box"> <span>图片可从最后一张跳转到第一张循环切换</span> <a id="prev" href="javascript:;"><</a> <a id="next" href="javascript:;">></a> <p id="p1">图片文字加载中……</p> <strong id="strong1">图片数量计算中……</strong> <img id="img1" /> </div> </body>