<style type="text/css"> #main{text-align:center; background-color:#9FF; height:600px;800px} #adver{ position:absolute; left:50px; top:30px; z-index:2; } </style> <script src="js/scroll.js"></script> </head> <body> <div id="adver"><img src="images/adv.jpg"/></div> <div id="testDiv" style="position:absolute;left:300px;top:50px;background-color:red; 80px; height:200px">内部样式的div</div> <input type="button" value="测试内部样式坐标位置" onClick="test('testDiv')"/> <input type="button" value="测试外部样式坐标位置" onClick="test('adver')"/> <div id="main">网页内容</div> </body>
function test (divID){ var divObj=document.getElementById(divID); alert("left="+divObj.style.left+" top="+divObj.style.top); //只能读取style属性设置的值，不能读取其他如：内部样式、外部样式的值 divObj.style.left=parseInt(divObj.style.left)+200+"px"; divObj.style.top=parseInt(divObj.style.top)+100+"px"; }