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DOM学习控件定位和案例

Dom中有多种定位属性,下面是一个简单案例

 1 <html><!--制作一个会跟着鼠标走的图像,还有控件定位的案例--> 2 <head> 3     <title>document practise</title> 4     <script type="text/javascript"> 5         //document.onclick=function(){alert("点击网页了!");} 6         function increWidth() { 7             var oldwidth = document.getElementById("1").style.width; 8             oldwidth = parseInt(oldwidth) + 50; 9             document.getElementById("1").style.width = oldwidth.toString() + "px";10         }11         document.onmousemove = function () {12             var x = window.event.clientX;13             var y = window.event.clientY;14             var divfly = document.getElementById("fly");15             //if (!divfly) return;16             divfly.style.left = x.toString()+"px";17             divfly.style.top= y.toString()+"px";18         }19        20     </script>21 </head>22 <body>23     <input type="button" value="http://www.mamicode.com/单位" id="1" style="width:50%" /><br />24     <input type="button" value="http://www.mamicode.com/获取单位长度" onclick="alert(document.getElementById(‘1‘).style.width)" /><br />25     <input type="button" value="http://www.mamicode.com/设置单位长度" onclick="document.getElementById(‘1‘).style.width=‘50px‘" />26     <input type="button" value="http://www.mamicode.com/加宽50" onclick="increWidth()" />27     <input type="button" value="http://www.mamicode.com/定位" style="position:fixed;bottom:200px;right:200px;" />28     <div id="fly" style="position:absolute">29         <img src="http://www.mamicode.com/images/front.jpg" width="100" height="120" />30         </div>31 </body>32 </html>

 

DOM学习控件定位和案例