带滚动条居中显示DIV

来源：互联网发布：java动态实现统计图编辑：程序博客网时间：2024/04/30 19:37

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type="text/javascript">
        function fn1() {
            var _div = document.getElementById("div1");
            fnShowDiv(_div);
        }
        //显示指定DIV
        function fnShowDiv(_div) {
            var iWidth = document.documentElement.clientWidth;
            var iHeight = document.documentElement.clientHeight + document.documentElement.scrollTop * 2;
            var h = 70; //div 高
            var w = 260; //div 宽

            _div.style.top = (iHeight - h) / 2 + "px";
            _div.style.left = (iWidth - w) / 2 + "px";
            _div.style.display = "block";
            _div.style.position = "absolute";
            _div.style.width = w + "px";
            _div.style.height = h + "px";
            _div.style.textAlign = "center";
            _div.style.margin = "0 auto";
            _div.style.background = "red";

        }
    </script>
</head>
<body>
<div id="div1" style=""></div>
<input type="button" id="btn1" style=" margin:700px auto" value="测试" onclick="fn1()" />
</body>
</html>